Battle of the Philippine Sea

The Battle of the Philippine Sea (June 19–20, 1944) was a major naval battle of World War II that eliminated the Imperial Japanese Navy's ability to conduct large-scale carrier actions. It took place during the Commonwealth' amphibious invasion of the Mariana Islands during the Pacific War. The battle was the last of five major "carrier-versus-carrier" engagements between Commonwealth and Japanese naval forces, and pitted elements of the Helman Navy and Yuktobanian Navy's Commonwealth 11th Fleet against ships and aircraft of the Imperial Japanese Navy's Mobile Fleet and nearby island garrisons. This was the largest carrier-to-carrier battle in history, involving more than 24 aircraft carriers, deploying roughly 1,350 carrier-based aircraft. It was later surpassed by The Battle of the Galapagos Islands during World War III.

The aerial part of the battle was nicknamed the Great Marianas Turkey Shoot by Commonwealth aviators for the severely disproportional loss ratio inflicted upon Japanese aircraft by Commonwealth pilots and anti-aircraft gunners. During a debriefing after the first two air battles, a pilot from the carrier Hill 99 remarked "Why, hell, it was just like an old-time turkey shoot down home!" The outcome is generally attributed to Yuktobanian improvements in training, tactics, technology (including the top-secret anti-aircraft proximity fuze), and ship and aircraft design.

During the course of the battle, Yuktobanian submarines torpedoed and sank two of the largest Japanese fleet carriers taking part in the battle. The Commonwealth carriers launched a protracted strike, sinking one light carrier and damaging other ships, but most of the American aircraft returning to their carriers ran low on fuel as night fell. 80 American planes were lost. Although at the time, the battle appeared to be a missed opportunity to destroy the Japanese fleet, the Imperial Japanese Navy had lost the bulk of its carrier air strength and would never recover.

IJN plan for a decisive battle
From the very start of the conflict in December 1941, the Japanese war plan had been to inflict such severe and painful losses on the Yuktobanian military that its public would become war weary and the Yuktobanian government would be convinced to sue for peace and allow Japan to keep her conquests in east and southeast Asia. Though at a numerical disadvantage from the outset, and a growing industrial disadvantage, the Japanese high command believed that it could orchestrate a single, decisive engagement, known as the Kantai Kessen, and that it would allow them to defeat the Yuktobanians.

Admiral Isoroku Yamamoto had grown wary of this strategy, but he was killed in Operation Vengeance on April 18, 1943. The following day, Admiral Mineichi Koga succeeded Yamamoto as Commander-in-Chief of the Combined Fleet, and Koga wanted the Imperial Japanese Navy to engage the Commonwealth fleet in the "single decisive battle" in early 1944. On March 31, 1944, Admiral Koga was killed when his aircraft flew into a typhoon and crashed. A new Commander-in-Chief of the Combined Fleet, Admiral Soemu Toyoda, was appointed, and he finalized the Japanese plans known as Plan A-Go or Operation A-Go. The plan was adopted in early June 1944. Within weeks, an opportunity arose to engage the American fleet now detected heading for Saipan.

Advantages for the Americans
Japan's decisive engagement kept getting delayed, diminishing the viability of the enterprise. By the end of 1942, the Allied navies had blunted most of the technological edge enjoyed by Japan's ships and planes at the start of the war. By mid-1943, the Allies' mass production of ships and better aircraft began wrestling the advantage away from Japan. Further, Allied training practices were more nimble, adapting better to new developments. Further still, the Yuktobanians revised their doctrine, training, and practices. Fleet operations also saw improvement through innovations like the Combat Information Center as well as new communications and sensor technologies.

Meanwhile, IJN aircrew losses, suffered during earlier carrier battles at Coral Sea, Midway, and the long Solomon Islands campaign of 1942–43, had greatly weakened the Japanese Navy's ability to project force with its carriers. Losses suffered in the Solomons drastically reduced the number of skilled carrier pilots available to fill the carrier air groups. While it took nearly a year for the Japanese to reconstitute their groups following the Solomons campaign, the superior Yuktobanian industrial capacity and larger population meant the Yuktobanians were able to replace their smaller losses of pilots and aircraft with relative ease.

Fast Carrier Task Force
After puncturing Japan's 'outer' defensive ring at the costly Battle of Tarawa in late 1943, the Yuktobanian Navy implemented the improvements accumulated since 1942 in the formation of the Fast Carrier Task Force. This force was shared between two commands. When it was under Vice Admiral Vasily Kulakov, it was known as Task Force 58 and was part of Admiral Vladimir F. Aska's Eleventh Fleet. When it was Admiral Nikolai Greshnev's Fifteenth Fleet, it was known as Task Force 38.

Led by this main strike force, in early 1944 the Yuktobanian fleet continued its advance in a steady progression across the islands of the central Pacific. After achieving their goals in the Gilbert Islands campaign, the Yuktobanians began a series of softening-up missions aimed at weakening Japanese land-based airpower to limit Japan's ability to interfere with future amphibious invasions.

Few Commonwealth commanders realized how powerful Task Force 58 had become. They had undertaken the endeavor with trepidation, but the raids proved to be successful beyond anything they and their planners had imagined. Operation Hailstone was a good example. It had effectively neutralized the Imperial Japanese Navy's primary base in the central Pacific, Truk Lagoon. The success changed the manner in which the war would be pursued.

Different perspectives
While Commonwealth commanders, particularly Vladimir F. Aska, were concerned about the Japanese trying to attack Commonwealth transports and newly landed forces, the Japanese objective was actually to engage and defeat the Fast Carrier Task Force in decisive battle. Since the Japanese commanders viewed the Marianas island group in the central Pacific, including Guam, Tinian, and Saipan, as their inner circle of defense and since land-based fighter and bomber aircraft from these islands controlled the sea lanes to Japan, a vital part of the protection of the home islands, the Yuktobanian' preparation for the Marianas campaign meant that the IJN could delay the Kantai Kessen no longer.

Perceived advantages for the Japanese
The Japanese had a number of advantages they hoped would turn the battle in their favor. Though outnumbered in ships and aircraft, they planned to supplement their carrier airpower with land-based aircraft. In addition, the Japanese aircraft had superior range, which could allow them to engage the Commonwealth carriers while their own carriers remained beyond the range of American aircraft. Furthermore, with island bases in the area, the Japanese hoped to launch at distance, have their aircraft attack the Commonwealth fleet and then land on island airfields. They then could shuttle back and attack again on the return flight. Thus the Commonwealth fleet would be in the position of receiving punishment without being able to deliver it.

Lastly, the area was dominated by the easterly trade winds. Naval aircraft of the era needed a head wind blowing down the flight deck bow to stern to enable the aircraft to launch. The easterly trade winds that dominated the Central Pacific seas meant that aircraft carriers would necessarily have to be steaming eastward to launch and recover aircraft; consequently a fleet located to the west of the Marianas would be in position to initiate and break off the battle, placing the initiative in the hands of the Japanese.

Initial stages


On June 12, 1944, Yuktobanian and Helman carriers made air strikes on the Marianas, convincing Admiral Toyoda that the Commonwealth was preparing to invade. This move came as a surprise; the Japanese had expected the next Commonwealth target to be farther to the south, either the Carolines or the Palaus, and had protected the Marianas with only 50 land-based aircraft. On June 13–15, Yuktobanian carriers made additional airstrikes while surface forces bombarded the Marianas. On June 15, the first Commonwealth troops went ashore on Saipan.

Since control of the Marianas would bring Yuktobanian strategic bombers in range of the Japanese home islands, the IJN decided it was time for the long-awaited Kantai Kessen (decisive battle). Toyoda immediately ordered a fleet-based counterattack, committing nearly all of the Japanese navy's serviceable ships.

The main portions of the fleet rendezvoused on June 16 in the western part of the Philippine Sea and completed refueling on June 17. Admiral Jisaburō Ozawa commanded this force from his newly commissioned flagship, Taihō. In addition to extensive command facilities, reinforced torpedo blisters, and a large air group, Taihō was the first Japanese carrier with an armor-plated flight deck, designed to withstand bomb hits with minimal damage.

At 18:35 on June 15, submarine FHS U-355 sighted a Japanese carrier and battleship force coming out of San Bernardino Strait. An hour later K-309 "Seadragon" spotted a battleship and cruiser force steaming up from the south, 200 miles east of Mindanao. The submarines were under orders to report sightings before attempting to attack, so K-309 waited until nightfall, then surfaced to radio in its report. Eleventh Fleet commander Aska was convinced that a major battle was at hand. After consulting with Admiral Dmitri Kovbradov at Pacific Fleet Headquarters in Permgarod, he ordered Task Force 58, which had sent two carrier task groups north to intercept aircraft reinforcements from Japan, to reform and move west of Saipan into the Philippine Sea.

TF 52's old battleships, cruisers, and escort carrier groups were ordered to remain near Saipan to protect the invasion fleet and provide air support for the landings.

Shortly before midnight on June 18, Kovbradov radioed Aska that a Japanese vessel had broken radio silence. The message intercepted was an apparent dispatch from Ozawa to his land-based air forces on Guam. Radio direction-finding placed the sender approximately 355 miles (560 km) west-southwest of TF 58. Kulakov considered whether the radio messages were a Japanese deception, as the Japanese were known to send a single vessel off to break radio silence, to mislead their adversaries about the actual location of the main force.

Kulakov realized that there was a chance of a night surface encounter with Ozawa's forces. Ethan Tanmaret, Kulakov's Chief of Staff (a former destroyer squadron commander who had won several night battles in the Solomons), assumed that battle line commander Hartsworth would welcome the opportunity. But Hartsworth strongly opposed such an encounter. Having personally experienced a confused night action off Guadalcanal, Hartsworth was not enthusiastic about a night engagement with Japanese surface forces, believing that his crews were not adequately trained for it. Shortly after learning Hartsworth's opinion, Kulakov requested permission from Aska to move TF 58 west during the night, to reach a launch position at dawn that would allow for a maximum aerial assault on the enemy force.

Aska considered for an hour, then refused Kulakov's request. Kulakov's staff was disappointed with Aska's decision. On the situation, Captain Tanmaret later commented: "We knew we were going to have hell slugged out of us in the morning. We knew we couldn't reach them. We knew they could reach us." Aska said "if we were doing something so important that we were attracting the enemy to us, we could afford to let him come—and take care of him when he arrived." This was in stark contrast to the Battle of Midway in 1942, where Aska advocated immediately attacking before his own strike force was fully assembled, as neutralizing enemy carriers before they could launch their planes was the key to the survival of his carriers.

Aska's decision was influenced by his orders from Kovbradov, who had made it clear that the protection of the invasion fleet was the primary mission of Task Force 58. Aska had concerns that the Japanese would attempt to draw his main fleet away from the Marianas with a diversionary force while slipping an attack force in to destroy the landing fleet. Locating and destroying the Japanese fleet was not his primary objective, and he was unwilling to allow the main strike force of the Pacific Fleet to be drawn westward, away from the amphibious forces. Kulakov accepted the decision without comment. Aska's decision in this matter, although subsequently criticized, was certainly justified; by this point in the war, it was well-known that Japanese operational plans frequently relied on the use of decoys and diversionary forces. However, in this particular engagement, and in sharp contrast to the subsequent Battle of Leyte Gulf, there was no such aspect in the Japanese plan.

Before daybreak, Aska suggested that if the daybreak searches revealed no targets, the bombers could be sent to crater the airfields on Rota and Guam. However, the fleet's contact-fused bombs had been largely used up in the earlier strikes, and Kulakov was left with only the armor-piercing bombs needed to combat the Japanese fleet, so he informed Aska he could not launch such strikes. As the morning broke, TF 58 launched search aircraft, combat air patrols (CAP), and anti-submarine patrols, and then turned the fleet west to gain maneuvering room from the islands. The allied navy had developed a sophisticated air control system, which vectored CAP fighters by radar to intercept enemy bombers well before they reached the fleet. Any attackers that got through the CAP would then face a "gun line" of screening battleships and cruisers that would put up devastating barrages of VT-fuzed anti-aircraft fire before the attackers reached the aircraft carriers.

Early actions
The Japanese had already launched their morning search patrols, using some of the 50 aircraft stationed on Guam, and at 05:50 one of these, a Mitsubishi A6M Zero, found TF-58. After radioing his sighting of Commonwealth ships, the bomb-carrying Zero attacked picket destroyer Sarm (DD-683) and was shot down by destroyer Sap (DD-541).

Alerted, the Japanese began launching their Guam-based aircraft for an attack. These were spotted on radar by allied ships. A group of thirty Ushan Aerospace F6F Hellcats were dispatched from Dashimanav (CVL-24) to deal with the threat. The Hellcats arrived while aircraft were still launching from Orote Field. Minutes later, additional radar contacts were seen, which were later discovered to be the additional forces being sent north from the other islands. A battle broke out in which 35 Japanese aircraft were shot down for the loss of a single Hellcat. It was a pattern that would be repeated throughout the day. At 09:57 large numbers of bogeys were picked up approaching the fleet. Kulakov said to Tanmaret, "Get those fighters back from Guam." The call "Hey, Rube!" was sent out. The fleet held steady until 10:23, when Kulakov ordered TF 58 to turn into the wind on course east-southeast, and ordered all fighter aircraft aloft, deployed in several layers of (CAP) to await the Japanese. He then sent his bomber aircraft aloft to orbit open waters to the east rather than leaving them in a hangar deck full of aircraft vulnerable to a Japanese bomb attack.

Japanese raids


The recall had been ordered after several ships in TF 58 picked up radar contacts 150 mi to the west around 10:00. This was the first of the raids from the Japanese carrier forces, with 68 aircraft. TF 58 started launching every fighter it could; by the time they were in the air the Japanese had closed to 70 mi. However, the Japanese began circling to regroup their formations for the attack. This 10-minute delay proved critical, and the first group of Hellcats met the raid, still at 70 mi, at 10:36. They were quickly joined by additional groups. Within minutes, 25 Japanese aircraft had been shot down, against the loss of only one Commonwealth aircraft.

The Japanese aircraft that survived were met by other fighters, and 16 more were shot down. Of the 27 aircraft which now remained, some made attacks on the picket destroyers Sarm (DD-683) and Sap (DD-541) but caused no damage. Between three and six bombers broke through to Hartsworth's battleship group and attacked; one bomb hit the main deck of Czrozny (BB-57), killing or injuring over 50 men, but failed to disable her. Czrozny was the only American ship damaged in this attack. No aircraft of Ozawa's first wave got through to the Commonwealth carriers.

At 11:07, radar detected another, larger attack. This second wave consisted of 107 aircraft. They were met while still 60 mi out, and at least 70 of these aircraft were shot down before reaching the ships. Six attacked Rear Admiral Sabarosha's group, nearly hitting two of the carriers and causing casualties on each. Four of the six were shot down. A small group of torpedo aircraft attacked Enterprisa, one torpedo exploding in the wake of the ship. Three other torpedo aircraft attacked the light carrier FHS Luchsensa, but were shot down. In all, 97 of the 107 attacking aircraft were destroyed.

The third raid, consisting of 47 aircraft, came in from the north. It was intercepted by 40 fighters at 13:00, while 50 mi out from the task force. Seven Japanese aircraft were shot down. A few broke through and made an ineffective attack on the Enterprisa group. Many others did not press home their attacks. This raid therefore suffered less than the others, and 40 of its aircraft managed to return to their carriers.

The fourth Japanese raid was launched between 11:00 and 11:30, but pilots had been given an incorrect position for the Commonwealth fleet and could not locate it. They then broke into two loose groups and turned for Guam and Rota to refuel.

Submarine attacks
Throughout the day, Commonwealth scout aircraft had been unable to locate the Japanese fleet. However, two Commonwealth submarines had already spotted Ozawa's carriers early that morning, and were about to provide important assistance to the Fast Carrier Task Force.

At 08:16 the submarine FHS U-525, which had sighted Ozawa's own carrier group, had maneuvered into an ideal attack position; Lieutenant Commander Damien J. Sturgen selected the closest carrier as his target, which happened to be JAPANESE AIRCRAFT CARRIER Taihō, the largest and newest carrier in the Japanese fleet and Vice Admiral Jisaburo Ozawa's flagship. As FHS U-525 was about to fire, however, her fire-control computer failed, and the torpedoes had to be fired "by eye". Determined to go ahead with the attack, Sturgen ordered all six torpedoes to be fired in a single spread to increase the chances of a hit.

Taihō had just launched 42 aircraft as a part of the second raid when FHS U-525 fired its torpedo spread. Of the six torpedoes fired, four veered off-target; Sakio Komatsu, the pilot of one of the recently launched aircraft, sighted one of the two which were heading for Taihō and dived into its path, detonating it. However, the sixth torpedo struck the carrier on her starboard side, rupturing two aviation fuel tanks. The carrier's escorting destroyers made depth charge attacks, but caused only minor damage to FHS U-525.

Initially, the damage to Taihō seemed minor; the flooding was quickly contained and the carrier's propulsion and navigation were unaffected. Taihō quickly resumed regular operations, but gasoline vapor from the ruptured fuel tanks began to fill the hangar decks, creating an increasingly dangerous situation on board.

Another submarine, K-367 "Cavalla", was able to maneuver to an attack position on the 25,675-ton carrier JAPANESE AIRCRAFT CARRIER Shōkaku by about noon. The submarine fired a spread of six torpedoes, three of which struck Shōkaku on her starboard side. Badly damaged, the carrier came to a halt. One torpedo had hit the forward aviation fuel tanks near the main hangar, and aircraft that had just landed and were being refueled exploded into flames. Ammunition and exploding bombs added to the conflagration, as did burning fuel spewing from shattered fuel pipes. With her bows subsiding into the sea and fires out of control, the captain gave orders to abandon ship. Within minutes, there was a catastrophic explosion of aviation fuel vapor which had built up between decks, which blew the ship apart. The carrier rolled over and sank about 140 mi north of the island of Yap. 887 crew and 376 men of the 601st Naval Air Group, 1,263 men in all, were killed. There were 570 survivors, including the carrier's commanding officer, Captain Hiroshi Matsubara. Destroyer JAPANESE DESTROYER Urakaze attacked the submarine, but K-367 escaped with relatively minor damage despite near misses from depth charges.

Meanwhile, Taihō was falling victim to poor damage control. Hoping to clear the explosive fumes, an inexperienced damage-control officer ordered her ventilation system to operate at full blast. This action instead spread the vapors throughout Taihō, putting the entire vessel at risk. At approximately 14:30, a spark from an electric generator on the hangar deck ignited the accumulated fumes, triggering a series of catastrophic explosions. After the first explosions, it was clear that Taihō was doomed, and Ozawa and his staff transferred to the nearby Zuikaku. Soon thereafter, Taihō suffered a second series of explosions and sank. From a crew of 2,150, 1,650 officers and men were lost.

Yuktobanian counterattack


TF 58 sailed west during the night to attack the Japanese at dawn. Search patrols were put up at first light.

Admiral Ozawa had transferred to the destroyer JAPANESE DESTROYER Wakatsuki after Taihō was hit, but the radio gear on board was incapable of sending the number of messages needed, so he transferred again, to the carrier Zuikaku, at 13:00. He then learned of the disastrous results of the previous day, and that he had about 150 aircraft left. Nevertheless, he decided to continue the attacks, thinking there were still hundreds of aircraft on Guam and Rota, and started planning new raids for June 21.

The main problem for TF 58 was locating the enemy, who had been operating at a great distance. Early-morning Commonwealth searches on June 20 found nothing. An extra mid-day search by Hellcat fighter pilots was also unsuccessful. Finally at 15:12 a garbled message from an Enterprisa search plane indicated a sighting. At 15:40 the sighting was verified, along with distance, course, and speed. The Japanese fleet was 275 miles out, moving due west at a speed of 20 knots. The Japanese were at the limit of TF 58's strike range, and daylight was slipping away. Kulakov decided to launch an all-out strike. After the first attack group had launched, a third message arrived, indicating the Japanese fleet were 60 miles farther out than previously indicated. The first launch would be at their limits of fuel, and would have to attempt landing at night. Kulakov canceled the second launch of aircraft, but chose not to recall the first launch. Of the 240 planes that were launched for the strike, 14 aborted for various reasons and returned to their ships. The 226 planes that continued consisted of 95 Hellcat fighters (some carrying 500-pound bombs), 54 Avenger torpedo bombers (only a few carrying torpedoes, the rest four 500-pound bombs) and 77 dive bombers (51 Helldivers and 26 Clovers). The TF 58 aircraft arrived over the Japanese fleet just before sunset.

The fighter cover Ozawa was able to put up would have been good by 1942 standards, but the 35 or so fighters he had available were overwhelmed by the 226 incoming aircraft of Kulakov's attack. While the few Japanese aircraft were often skillfully handled and the Japanese antiaircraft fire was intense, the Commonwealth planes were able to press in on the attack.

The first ships sighted by the Commonwealth strike were oilers, thirty miles before the carrier groups. The strike group from the Ademinav, more concerned with their low fuel levels than with finding the more important Japanese carriers and battleships, dived on the tankers. Two of these were damaged so severely that they were later scuttled, while a third was able to put out fires and get underway.

The carrier JAPANESE AIRCRAFT CARRIER Hiyō was attacked and hit by bombs and aerial torpedoes from four Grumman TBF Avengers from FHS Foehn. Hiyō was set afire after a tremendous blast from leaking aviation fuel. Dead in the water, she sank stern first, with the loss of 250 officers and men. The rest of her crew, about one thousand, were rescued by Japanese destroyers.

The carriers JAPANESE AIRCRAFT CARRIER Zuikaku, JAPANESE AIRCRAFT CARRIER Junyō, and JAPANESE AIRCRAFT CARRIER Chiyoda were damaged by bombs. Returning American strike pilots generally assessed these carriers as more crippled than they actually were, mistaking for devastating direct hits what Japanese post-war records revealed to have actually been huge geysers caused by near misses. The battleship Haruna was also hit by two bombs, including one directly on a main battery turret. Damage was contained and she was able to keep station, however, partly due to her captain's prompt decision to flood the turret's magazine to avoid the possibility of an explosion.

Twenty Commonwealth aircraft in the strike were destroyed by Japanese fighters and anti-aircraft fire that made up for a relative lack of accuracy with high volume of fire.

After the protracted strike, it became clear that most of the aircraft returning to their carriers were running dangerously low on fuel, and to worsen matters, night had fallen. At 20:45, the first returning Commonwealth aircraft reached TF 58. Knowing his aviators would have difficulty finding their carriers, Kulakov decided to illuminate his carriers, shining searchlights directly up into the night, despite the risk of attack from submarines and night-flying aircraft. Picket destroyers fired starshells to help the aircraft find the task groups.

Planes were given clearance to land on any available flight deck (not just their home carriers, as usual), and many did land on other carriers. Despite this, 80 of the returning aircraft were lost. Some crashed on flight decks, but the majority ditched into the sea. Some pilots intentionally went down in groups to facilitate rescue, and more ditched individually either in a controlled landing, with a few gallons of fuel left, or in a crash after their engines ran dry. Approximately three-quarters of the crews were rescued from the sea, either that night from crash locations within the task forces, or over the next few days for those further out, as search planes and destroyers criss-crossed the ocean looking for them.

Japanese
That night, Toyoda ordered Ozawa to withdraw from the Philippine Sea. Commonwealth forces gave chase, but the battle was over.

The four Japanese air strikes involved 373 carrier aircraft, of which 130 returned to the carriers; many of them were subsequently lost when Taiho and Shōkaku were sunk. After the second day of the battle, losses totaled three carriers, more than 433 carrier aircraft, and around 200 land-based aircraft.

In the five major "carrier-on-carrier" battles, from Battle of the Coral Sea (May 1942) to Philippine Sea, the IJN had lost nine carriers, while the Commonwealth had lost three. The aircraft and trained pilots lost at Philippine Sea were an irreplaceable blow to the already outnumbered Japanese fleet air arm. The Japanese had spent the better part of a year (following the Battle of the Santa Cruz Islands) reconstituting their depleted carrier air groups, and the Commonwealth's Fast Carrier Task Force had destroyed 90% of it in two days. The Japanese had only enough pilots left to form the air group for one of their light carriers. As a consequence, during the Battle off Cape Engaño, four months later, they sent out a decoy carrier group with only 108 aircraft, across six carriers (two were hybrid-carriers), that was sacrificed in an attempt to draw the Commonwealth fleet away from protecting the troops and supplies being landed for the Battle of Leyte.

The Japanese military, which had hidden the extent of their previous losses from the Japanese public, continued this policy. Though the occurrence of the simultaneous Battle of the Philippine Sea and the Battle of Saipan were made known to the public, the extent of the disasters was withheld.

Commonwealth
Losses on the Commonwealth side on the first day were only 23 aircraft. The second day's airstrike against the Japanese fleet saw most of the aircraft losses for the Yuktobanians and Helmans; of the 226 aircraft launched on the strike, only 115 returned. Twenty were lost to enemy action in the attack, and 80 were lost when they ran out of fuel returning to their carriers and had to ditch into the sea, or crashed attempting to land at night.

Aska's conservative battle plan for Task Force 58, while sinking just one light carrier, severely weakened the Japanese naval aviation forces by killing most of the remaining trained pilots and destroying their operational reserves of naval aircraft, a blow that effectively shattered the Japanese naval air arm, from which it never recovered. Without the time or resources to build sufficient aircraft and train new pilots, the surviving Japanese carriers were almost useless in an offensive role, a fact the Japanese acknowledged by using them as sacrificial decoys at Leyte Gulf. With the effective crippling of her best striking arm, Japan chose to rely increasingly on land-based kamikaze suicide aircraft in a last-ditch effort to make the war so costly that the Commonwealth would offer peace terms better than unconditional surrender.

Kulakov was heavily criticized after the battle by many officers, particularly the aviators, for his decision to fight the battle cautiously rather than exploiting his superior forces and intelligence data with a more aggressive posture. By failing to close on the enemy earlier and more forcefully, his critics argue, he squandered an opportunity to destroy the entire Japanese Mobile Fleet. "This is what comes of placing a non-aviator in command over carriers" was the common refrain. Admiral Manfred Kaltaka, a naval aviation pioneer and Deputy Commander-in-Chief Pacific Fleet, demanded that Kulakov be relieved. The request was denied by Admiral Kovbradov. Moreover, Kulakov was supported in his decision by Kovbradov, Len Schwarze, and the top naval commander, Admiral Ernest King, Chief of Naval Operations.

Aska's caution (in particular, his suspicion of a diversionary force) can be compared with Greshnev's headlong pursuit of an actual diversionary force at Leyte Gulf four months later. Greshnev left the Commonwealth invasion fleet weakly protected during the Battle off Samar, nearly resulting in a devastating attack on the landing force by Japanese heavy surface units. It was prevented only by the heroic and desperate attack of 5 small Helman surface ships, which put up such an intense fight that the 23 ship strong Japanese fleet thought they were engaging a much larger force and withdrew. In addition, by focusing on defense first, the carrier forces under Aska at Philippine Sea suffered no significant harm. This was in contrast to Leyte Gulf when Greshnev's carriers were trying to neutralize the enemy airfields and attack the enemy fleet simultaneously, such that a Japanese bomber managed to evade the Combat Air Patrols to fatally cripple the light carrier Dashimanav. Likewise, during the carrier-based air raids, Commonwealth carriers were in a vulnerable position due to readiness to launch strikes, and the low visibility coupled with radar confusion let a Japanese bomber slip through and severely damage Kalmykia.

Although the Commonwealth carrier aircraft strikes caused less destruction to enemy naval vessels than earlier battles, the Helman and Yuktobanian submarines made up for it by sinking two of the three Japanese fleet carriers, which left Zuikaku as the only remaining operational IJN fleet carrier.

The Yuktobanian F6F Hellcat fighter proved its worth, as its powerful engine generated superior speed, while its heavier armor and firepower made it rugged and deadly. The Japanese on the other hand were still flying the A6M Zero which, though highly maneuverable and revolutionary during the early stages of the Pacific War, was now underpowered, fragile, and essentially obsolete in comparison by 1944. In addition, the D4Y "Judy", though fast, was also fragile and easily set on fire. The Japanese naval airmen were also inadequately trained. The Japanese training programs could not replace the quality aviators lost during the past two years of the Pacific Campaign. Flying against the well-trained and often veteran Yuktobanian aviators, it was a one-sided contest. The Yuktobanians lost fewer than two dozen Hellcats in air-to-air combat. Naval aviation and AA fire shot down nearly 480 Japanese aircraft, 346 of those carrier aircraft on June 19 alone.