Battle of the Philippine Sea

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Battle of the Philippine Sea
Part of World War II, Pacific War
The carrier Zuikaku (center) and two destroyers under attack by U.S. Navy carrier aircraft, 20 June 1944
Date 19–20 June 1944 Location The Philippine Sea Result Decisive American victory
Combatants
United States Navy	Imperial Japanese Navy
Commanders
Ray Spruance	Jisaburo Ozawa
Strength
7 heavy carriers, 8 light carriers, 7 battleships, 79 other ships, 28 submarines, 956 planes	6 heavy carriers, 3 light carriers, 5 battleships, 43 other ships, 450 carrier-based planes, 300 land-based planes
Casualties
123 planes destroyed (about 80 of whose crews survived)	3 carriers sunk, 2 oilers sunk, about 600 planes destroyed, 6 ships other heavily damaged

The Battle of the Philippine Sea was an air-sea battle of the Pacific campaign of World War II fought between the U.S. Navy and the Imperial Japanese Navy (IJN) on 19 and June 20, 1944, off the Mariana Islands. The action was a disaster for the Japanese forces, who lost almost all of their carrier-borne aircraft and a third of the carriers involved in the battle. After the battle, the aircraft carrier force of the IJN was no longer militarily effective.

[edit] A-Go

In September 1943, IJN Headquarters decided that the time was right to go back on the offensive in the Pacific. Since the U.S. was attacking Japanese-held islands on their “island-hopping campaign,” the lack of planes themselves could be addressed with the addition of strong land-based forces. The result was Operation A-Go, which would take place some time in early 1944, attacking the U.S. Pacific Fleet while it launched its next minor offensive. On May 3, orders for A-Go were sent out, and the waiting began.

The Japanese fleet, commanded by Vice-Admiral Jisaburo Ozawa, consisted of six fleet carriers (Taihō, Shōkaku, Zuikaku, Junyō, Ryuho, and Hiyō), three light carriers (Chitose, Chiyoda, and Zuihō), five battleships (Yamato, Musashi, Kongō, Haruna, and Nagato) and supporting cruisers, destroyers, and oilers.

On June 11, U.S. carrier-borne forces started a series of small strikes on the Marianas, convincing Admiral Toyoda Soemu, Commander-in-Chief of the Combined Fleet, that the U.S. was preparing to invade. This came as something of a surprise, as they had expected the next U.S. target to be further to the south, at either the Carolines or the Palaus, and therefore the Marianas were protected with a weak force of only 50 aircraft.

On 15 June 1944, the U.S. started their invasion of Saipan, and Toyoda gave the order for the attack. The main portions of the fleet, consisting of six carriers and several battleships, rendezvoused on June 16 in the western part of the Philippine Sea, and completed refueling on June 17.

[edit] U.S. response

The Japanese forces had been sighted on June 15 by American submarines, and by the next day Admiral Ray Spruance, commander of the U.S. 5th Fleet, was convinced a major battle was about to start. By the afternoon of 18 June Admiral Marc Mitscher, aboard his flagship (the carrier Lexington) had his Task Force 58 (the Fast Carrier Task Force) formed up near Saipan to meet the Japanese attack.

TF-58 consisted of five major groups. In front (to the west) was Admiral Willis Lee’s Task Group 58.7 (TG-58.7), the “Battle Line,” consisting of seven fast battleships (Washington, North Carolina, Indiana, Iowa, New Jersey, South Dakota, and Alabama). Just north of them was the weakest of the carrier groups, Rear Admiral William K. Harrill’s TG-58.4 of three carriers (Essex, Langley, and Cowpens). To the east came three groups of four carriers each in a line running north to south: Rear Admiral Joseph Clark’s TG-58.1 (Hornet, Yorktown, Belleau Wood, and Bataan); Rear Admiral Alfred Montgomery’s TG-58.2 (Bunker Hill, Wasp, Cabot, and Monterey); and Rear Admiral John W. Reeves’s TG-58.3 (Enterprise, Lexington, San Jacinto, and Princeton). The capital ships were supported by 8 heavy cruisers, 13 light cruisers, 58 destroyers, and 28 submarines.

Shortly before midnight on June 18, Admiral Chester W. Nimitz sent Spruance a message from Pacific Fleet Headquarters indicating that the Japanese flagship was approximately 350 miles (560 km) to the west-southwest of Task Force 58. Shortly thereafter, Mitscher asked for permission to head west during the night to an ideal launch position for an all-out attack on the enemy force at dawn.

However, Spruance refused. Throughout the run-up to the battle he had been concerned that the Japanese would try to draw his main fleet away from the landing area using a diversionary force, and would then make an attack around the flank of the U.S. carrier force—an “end run”—hitting the invasion shipping off Saipan. Instead he placed TF-58 on a purely defensive footing, leaving it to the Japanese to set the pace of the battle.

Spruance was heavily criticized by many officers after the battle, and continues to be to this day, as he missed the chance to destroy all of the Japanese strike force when given the chance, but it is instructive to compare Spruance’s caution with Admiral “Bull” Halsey’s impetuous pursuit of a diversionary force of Japanese carriers at the Battle of Leyte Gulf.

[edit] Early actions, June 19

At 05:30 TF-58 turned north-east into the wind and started to launch their air patrols. At about the same time a number of the 50 aircraft on Guam started up on search missions. At 05:50, one of these, a Mitsubishi Zero, found TF-58. After radioing in its position, he attacked one of the destroyers on picket duty and was shot down.

Over an hour the rest of the Guam forces were being formed up for an attack. They were spotted on radar and a group of Hellcats from Belleau Wood were sent to investigate. They arrived while the attack was still only 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 huge battle broke out; 35 of the Japanese planes were shot down and the battle was still going an hour later when the Hellcats were recalled to their carriers.

[edit] Japanese raids: The Great Marianas Turkey Shoot

Fighter plane contrails mark the sky over Task Force 58, 19 June 1944

The recall had been ordered after a number of ships in TF-58 picked up a number of radar contacts 150 miles (240 km) to the west at about 10:00. This was the first of the raids from the Japanese carrier forces, with 68 aircraft. TF-58 started launching every fighter they could, and by the time they were up the Japanese had closed to 70 miles (110 km). However, they then made a fatal mistake, and started circling in order to regroup their formations for the attack. This ten-minute delay proved critical, and the first group of Hellcats met the raid, still at 70 miles, at 10:36. They were quickly joined by additional groups, and within minutes 25 Japanese planes had been shot down for the loss of only one U.S. aircraft.

The Japanese planes which survived were met by other fighters and 16 more were shot down. Of the remainder some made attacks on the picket destroyers Yarnall and Stockham, but caused no damage. Three or four bombers broke through to the battleship group, and one made a direct hit on South Dakota, which caused many casualties but failed to disable her. Not one aircraft of Ozawa’s first wave got through to the American carriers.

At 11:07, radar detected another and much larger attack. This second wave consisted of 109 aircraft. They were met while still 60 miles (100 km) out, and no less than 70 of these aircraft were shot down before reaching the ships. Six attacked Rear Admiral Montgomery’s group, making near-misses which caused casualties on two of the carriers. Four of the six were shot down. A small group of torpedo aircraft attacked USS Enterprise, launching a torpedo which exploded in the wake of the ship. Three other torpedo-planes attacked the light carrier Princeton, but were shot down. In all, 97 of the 107 attacking aircraft were shot down.

The third raid, consisting of 47 aircraft, came in from the north. It was intercepted by 40 fighters at 13:00, while 50 miles out from the task force. Seven Japanese planes were shot down. A few broke through and made an ineffective attack on the Enterprise 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.

USS Bunker Hill is nearly hit by a Japanese bomb, during the air attacks of 19 June 1944.

The fourth raid was launched between 11:00 and 11:30, but had been given an incorrect location for the Americans and could not find the fleet. They then broke into two loose groups and turned to Guam and Rota to refuel. One group of aircraft flying towards Rota stumbled upon Montgomery’s task group. Eighteen aircraft joined battle with American fighters and lost half its number. A smaller group of nine Japanese dive bombers of the this force evaded U.S. planes and made attacks on USS Wasp and USS Bunker Hill, but failed to make any hits. Eight of these aircraft were shot down in the process. The larger group of Japanese planes had flown to Guam and were intercepted over Orote Field by 27 Hellcats while landing. 30 of the 49 Japanese planes were shot down, and the rest were damaged beyond repair. The entirely lopsided result of these air battles led many Americans to dub it the “Great Marianas Turkey Shoot.”

[edit] Submarine attacks

At 08:16 the submarine USS Albacore had sighted Ozawa’s own carrier group, and began an attack on the easiest carrier to reach. This happened to be the carrier Taihō, Admiral Ozawa’s flagship. As Albacore was about to fire, however, her fire-control computer failed, and the torpedoes had to be fired “by eye.”

Taihō had just launched 42 aircraft as a part of the second raid. Four of Albacore’s torpedoes were off-target. Sakio Komatsu, the pilot of one of the recently-launched aircraft, sighted one of the two which were heading for Taihō and crashed his aircraft on it, but the last torpedo struck the carrier on her starboard side near her aviation-fuel tanks. At first the damage did not appear to be very serious.

Another submarine, USS Cavalla, was able to maneuver to an attack position on the carrier Shōkaku by about noon. Three torpedoes hit Shōkaku, setting her afire. At 15:00 the fire reached the bomb magazine, blowing the ship apart.

Meanwhile, Taihō was falling victim to poor damage control. On the orders of an inexperienced damage-control officer, her ventilation system had been operated full-blast in an attempt to clear explosive fumes from the ship. This instead had the effect of spreading the vapors throughout Taihō, and at 17:32 she exploded and sank.

[edit] U.S. counterattack

Japanese Carrier Division Three under attack by United States Navy aircraft from Task Force 58, late afternoon, 20 June 1944. The heavy cruiser circling at right, nearest to the camera, is either Maya or Chōkai. Beyond that, is the small aircraft carrier Chiyoda.

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

Admiral Ozawa had transferred to the destroyer Wakatsuki after Taihō had been hit, but the radio gear onboard was not capable of sending the number of messages needed, so he transferred again, to the carrier Zuikaku, at 13:00. It was then that he learned of the disastrous missions of the day before, and that he had only 100 or so aircraft left. Nevertheless, he decided to continue the attacks, thinking that there were hundreds of planes on Guam and Rota, and started planning new raids to be launched on the 21st.

American searches failed to locate the Japanese fleet until 15:40. However the report made was so garbled that Mitscher knew neither what had been sighted nor where. At 16:05 another report was received that was clearer, and Mitscher decided to launch an “Alpha strike” even though there were only 75 minutes to sunset. The attack went in at 18:30.

Ozawa had been able to put up very few fighters to intercept—no more than 35 according to later estimates, but these few were skilfully handled, and the Japanese ships’ antiaircraft fire was intense. The U.S. raid, however, contained 216 planes, and the majority were able to press the attack.

The first ships sighted by the U.S strike were oilers, and two of these were damaged so severely that they were later scuttled. The carrier Hiyō was attacked by 4 Grumman Avengers from Belleau Wood, was hit by at least one of their torpedoes, and later sank. The carriers Zuikaku, Junyō, and Chiyoda were damaged by bombs, as was the battleship Haruna. 20 American aircraft were lost in this strike.

At 20:45, the first U.S. planes began to return to TF-58. Mitscher decided to fully illuminate his carriers, despite the risk of attack from submarines and night-flying aircraft, and the picket destroyers fired starshells to help the planes find the task groups. Despite this, 80 of the returning aircraft were lost, some crashing on flight decks, the majority going into the sea. Many of the crews were rescued over the next few days.

[edit] End of the battle

That night, Admiral Ozawa received orders from Toyoda to withdraw from the Philippine Sea. U.S. forces gave chase, but the battle was over.

The four Japanese attacks used 373 carrier aircraft, of which 130 returned to the carriers, and several more were destroyed onboard the two carriers destroyed on the first day. After the second day the totals were three carriers and over 400 carrier aircraft and around 200 land based planes. Losses on the US side on the first day were only 23, and on the second 100, most due to night landings.

The losses to the Japanese were irreplaceable. In the Battle of Leyte Gulf, a few months later, their carriers were used solely as a decoy due to the lack of aircraft, and aircrews to fly them.

[edit] References

[edit] Books

• Brown, David (1990). Warship Losses of World War Two. Naval Institute Press. ISBN 155750914X.
• Thomas B. Buell. The Quiet Warrior: A Biography of Admiral Raymond A. Spruance (1987).
• D'Albas, Andrieu (1965). Death of a Navy: Japanese Naval Action in World War II. Devin-Adair Pub. ISBN 081595302X.
• Dull, Paul S. (1978). A Battle History of the Imperial Japanese Navy, 1941-1945. Naval Institute Press. ISBN 0-87021-097-1.
• Lacroix, Eric, Linton Wells (1997). Japanese Cruisers of the Pacific War. Naval Institute Press. ISBN 0870213113.
• Samuel Eliot Morison, New Guinea and the Marianas, March 1944 - August 1944, vol 8 of History of United States Naval Operations in World War II (1950).
• Barrett Tillman, Clash of the Carriers: The True Story of the Marianas Turkey Shoot of World War II.
• Lieutenant Commander J. Bryan III: Mission Beyond Darkness The story of USS Lexington's Air Group 16 June 20, 1944 attack on the Japanese carrier fleet as told by the men who flew that day (1945)
• William T. Y'Blood. Red Sun Setting: The Battle of the Philippine Sea (2003).

[edit] External links

• Order of battle
• WW2DB: The Marianas and the Great Turkey Shoot
• Animated History of The Battle of the Philippine Sea
• Air Group 31's participation in the Battle of the Philippine Sea

[edit] Notes