American missions against Ulithi Atoll (Urushi Atoll)
March 30, 1944–September 20, 1944
March 30, 1944
(USN) Fifth Fleet Task Force 58 (TF-58) under the command of Vice Admiral M. A. Mitscher with 11 carriers launched a series of attacks Ulithi to eliminate opposition to the landings at Hollandia and to gather photo intelligence for future campaigns.
July 25-28, 1944
three groups of Task Force 58 (TF-58) conduct strikes on the Western Carolines including Ulithi while photographic planes obtained intelligence of enemy defenses.
September 20, 1944
(USN) Supports the landings at Ulithi Atoll
(U. S. Army) 81st Infantry Division occupies Ulithi without opposition finding only three Japanese and 400 native people.
Japanese missions against Ulithi Atoll (Urushi Atoll)
November 20, 1944–March 11, 1945
November 20, 1944
(IJN) Japanese submarines I-36, I-37 and I-47 transporting four Kaiten each form the "Kikusui Group" (Floating Chrysanthemum Group) on the first combat usage of the Kaiten (manned torpedoes). En route, I-37 was sunk. I-36 launches one Kaiten while I-47 launches four Kaiten. Only one Kaiten entered the anchorage and at 5:45am hit USS Mississinewa (AO-59) causing an explosion and sinks. It is generally believed to have hit by Kaiten No. 1 piloted by Lt(jg) Nishina Sekio.
March 11, 1945
(IJN) Twenrty-four P1Y Francis bombers took off from Japan on a one-way tokko (suicide) mission against Ulithi. Inbound, five aborted the mission and two ditched. Twelve ditched with the pilots missing. Three landed at Yap. A total of seventeen PY1s reached Ulithi at high altitude, dropped tin foil chaff to deceive America radars. then dove and flew in low over the water. The islands and ships were all illuminated and no air raid alert was sounded in advance. Only two managed to reach Ulithi Anchorage undetected.
The pilot of the first Ginga radioed "successful attack!” and at 8:07pm before slamming into USS Randolph (CV-15) anchored off Sorlen Island hitting the starboard side just below the flight deck but with little fuel aboard did not bust into flames. The explosion of its bomb destroyed planes on the flight deck and hangar deck and results in 26 killed and 105 wounded. The other Ginga mistook Sorlen Island for an aircraft carrier and crashed into it. Randolph was repaired locally and returned to action in early April 1945 and served as flagship of Task Force 58 (TF 58) during the later part of the Okinawa campaign.