Operation Tan No. 2

1945 Japanese kamikaze attack on a U. S. Navy ship at Naval Base Ulithi during World War II

Operation Tan No. 2 (第二次丹作戰, Dainiji Tan Sakusen) was a long range kamikaze mission directed at the main Allied naval fleet anchorage at Ulithi Atoll in the western Pacific on 11 March 1945 during the Pacific campaign of World War II. The Japanese hoped to take the U. S. Pacific Fleet by surprise and sink or damage a significant number of the fleet's aircraft carriers or other large ships.

The Azusa Special Attack Unit (梓特別攻撃隊), to which were allocated 24 "Yokosuka P1Y1" twin engine bombers, took off from the Kanoya Air Field on Kyushu, the southernmost of the Japanese home islands. The aircraft were bound for the US Naval Base Ulithi on a one way trip at the limits of their range in an attempt to destroy the Fifth Fleet carriers at anchor there. Each of the planes carried an 800 kg (1,700 pound) bomb, which they intended to deliver by crashing onto the flight decks. Support aircraft and submarines were used to help guide the attackers over their long flight. Some six of the P1Y1s suffered mechanical difficulties and had to turn back to their home base at Kanoya. Others landed at Yap island. Still others had to ditch at sea. Two of the twenty four aircraft reached Ulithi, arriving after nightfall and achieving complete surprise. One aircraft hit the Essex class aircraft carrier USS Randolph in the stern just below the flight deck, killing 26 men and wounding 105, many of whom were watching a movie in the ship's hangar deck. The second aircraft crashed onto an access road on the small island of Sorlen, apparently mistaking the road with its nearby signal tower for a ship. There were no deaths in the attack beyond the aircraft's crew, though several servicemen were injured from debris and ignited fuel.

Randolph was repaired at the port facilities available at Ulithi and rejoined the fleet in April 1945. She then took part in the Battle of Okinawa, where Admiral Marc Mitscher shifted his flag to her after kamikaze attacks successively knocked both USS Bunker Hill and USS Enterprise out of the battle.