American missions against Mokmer Drome and Biak Island
April 28, 1944–June 24, 1944

April 28, 1944
(5th AF) B-24s and B-25s bomb Biak Island airfields.

May 2, 1944
(5th AF) Two B-24s bomb the airfield on Biak.

May 6, 1944
(5th AF) B-24s bomb Biak.

May 7, 1944
(5th AF) B-24s, B-25s and P-40s hit Biak.

Japanese missions against Biak Island
May 27, 1944

May 27, 1944
(JAAF) a joint Japanese Army Air Force (JAAF) and Imperial Japanese Navy (IJN) air raid was launched to attack the U.S. landing on Biak. The JAAF sent four Ki-45 Nicks from 5th Sentai lead by Major Takada from Sorong with seven Ki-43-II Oscars from the 24th Hiko Sentai (24th Flying Regiment) led by Lt. Oshima.  The Nicks attempted to bomb & straffe the ships, followed by the Oscars to do the same. Over Biak, intercepted by P-47D Thunderbolts from 342nd Fighter Squadron (342nd FS) from Wakde that claim 5 of the single engines fighters shot down, but actual losses were four Oscars including Lt Oshima. All four Nicks were lost including the Ki-45 pilot Major Takada.