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Battle of Ormoc Bay
The Battle of Ormoc Bay was a series of air-sea battles between Imperial Japan and the United States in the Camotes Sea in the Philippines from 9 November to 21 December 1944, at Ormoc, part of the Battle of Leyte in the Pacific campaign of World War II. The battles resulted from Japanese operations to reinforce and resupply their forces on Leyte and U.S. attempts to interdict them.
After gaining naval control over the Western Pacific in mid-1944, the Allies attacked the Philippines in October, landing troops at Leyte Gulf on the east side of Leyte on 20 October 1944. The island of Leyte was defended by about 20,000 Japanese; American General Douglas MacArthur thought that the occupation of Leyte would be only a prelude to the major engagement on Luzon. For the Japanese, maintaining control of the Philippines was essential because their loss would enable the Allies to sever their oil supply lines from Borneo and Sumatra.
The Imperial Japanese Navy responded to this attack with a combined fleet attack that led to the Battle of Leyte Gulf from 23 to 26 October. In this massive naval engagement, the Japanese Navy was destroyed as a strategic force. However, this was not at first clear, and the Japanese commander in the Philippines, General Tomoyuki Yamashita, believed that the United States Navy had suffered severe casualties and that the Allied land forces might be vulnerable. Accordingly, he began to reinforce and resupply the garrisons on Leyte; over the course of the battle the Japanese ran nine convoys to the island, landing around 34,000 troops from the 1st, 8th, 26th, 30th, and 102nd divisions. Ormoc City at the head of Ormoc Bay on the west side of Leyte was the main port on the island and the main destination of the convoys.
Decryption of messages sent using the PURPLE cipher alerted the Allies to the concentration of Japanese shipping around Leyte, but they initially interpreted this as an evacuation. However, by the first week of November the picture was clear, and the Allies began to interdict the convoys.
On 8–9 November, the Japanese dispatched two convoys from Manila to Ormoc Bay. The convoys were spaced one day apart so that the destroyers escorting the first convoy could double back and escort the second. However, the convoys were spotted on November 9 and attacked by land-based aircraft of the Fifth Air Force. On 10 November the 38th Bomb Group, based on Morotai, sent 32 B-25 Mitchells escorted by 37 P-47 Thunderbolts to attack TA-4 near Ponson Island. Reaching the convoy just before noon, the B-25s attacked at minimum altitude in pairs, sinking the two largest transports, Takatsu Maru and Kashii Maru, disabling a third, and sinking two of the patrol craft escorts at a cost of seven bombers, for which the group was awarded the Distinguished Unit Citation. But the Japanese transports had been able to put ashore the 10,000 soldiers they had been carrying, be it with only a fraction of the supplies.
On 11 November, U.S. 3rd Fleet commander Admiral William F. Halsey ordered an attack by 350 planes of Task Force 38 on the combined convoys.
Four destroyers – Shimakaze, Wakatsuki, Hamanami and Naganami – and four transports Mikasa Maru, Taizan Maru, Seiho Maru and Tensho Maru were sunk, with many of the 4,000 soldiers on board killed. Rear Admiral Mikio Hayakawa went down with Shimakaze, and some 1,000 sailors from the 8 ships were killed.
Convoy TA-5 left Manila on 23 November for Port Cataingan and Port Balancan. Of the six transports, five were sunk by air attack (T-111, T-141, T-160, T-6 and T-10) .
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Battle of Ormoc Bay
The Battle of Ormoc Bay was a series of air-sea battles between Imperial Japan and the United States in the Camotes Sea in the Philippines from 9 November to 21 December 1944, at Ormoc, part of the Battle of Leyte in the Pacific campaign of World War II. The battles resulted from Japanese operations to reinforce and resupply their forces on Leyte and U.S. attempts to interdict them.
After gaining naval control over the Western Pacific in mid-1944, the Allies attacked the Philippines in October, landing troops at Leyte Gulf on the east side of Leyte on 20 October 1944. The island of Leyte was defended by about 20,000 Japanese; American General Douglas MacArthur thought that the occupation of Leyte would be only a prelude to the major engagement on Luzon. For the Japanese, maintaining control of the Philippines was essential because their loss would enable the Allies to sever their oil supply lines from Borneo and Sumatra.
The Imperial Japanese Navy responded to this attack with a combined fleet attack that led to the Battle of Leyte Gulf from 23 to 26 October. In this massive naval engagement, the Japanese Navy was destroyed as a strategic force. However, this was not at first clear, and the Japanese commander in the Philippines, General Tomoyuki Yamashita, believed that the United States Navy had suffered severe casualties and that the Allied land forces might be vulnerable. Accordingly, he began to reinforce and resupply the garrisons on Leyte; over the course of the battle the Japanese ran nine convoys to the island, landing around 34,000 troops from the 1st, 8th, 26th, 30th, and 102nd divisions. Ormoc City at the head of Ormoc Bay on the west side of Leyte was the main port on the island and the main destination of the convoys.
Decryption of messages sent using the PURPLE cipher alerted the Allies to the concentration of Japanese shipping around Leyte, but they initially interpreted this as an evacuation. However, by the first week of November the picture was clear, and the Allies began to interdict the convoys.
On 8–9 November, the Japanese dispatched two convoys from Manila to Ormoc Bay. The convoys were spaced one day apart so that the destroyers escorting the first convoy could double back and escort the second. However, the convoys were spotted on November 9 and attacked by land-based aircraft of the Fifth Air Force. On 10 November the 38th Bomb Group, based on Morotai, sent 32 B-25 Mitchells escorted by 37 P-47 Thunderbolts to attack TA-4 near Ponson Island. Reaching the convoy just before noon, the B-25s attacked at minimum altitude in pairs, sinking the two largest transports, Takatsu Maru and Kashii Maru, disabling a third, and sinking two of the patrol craft escorts at a cost of seven bombers, for which the group was awarded the Distinguished Unit Citation. But the Japanese transports had been able to put ashore the 10,000 soldiers they had been carrying, be it with only a fraction of the supplies.
On 11 November, U.S. 3rd Fleet commander Admiral William F. Halsey ordered an attack by 350 planes of Task Force 38 on the combined convoys.
Four destroyers – Shimakaze, Wakatsuki, Hamanami and Naganami – and four transports Mikasa Maru, Taizan Maru, Seiho Maru and Tensho Maru were sunk, with many of the 4,000 soldiers on board killed. Rear Admiral Mikio Hayakawa went down with Shimakaze, and some 1,000 sailors from the 8 ships were killed.
Convoy TA-5 left Manila on 23 November for Port Cataingan and Port Balancan. Of the six transports, five were sunk by air attack (T-111, T-141, T-160, T-6 and T-10) .