Outnumbered operationally more than three - to - one by aircraft of the Japanese Navy and Army , FEAF was largely destroyed during the Philippines Campaign of 1941 -- 42 .
Initially the Far East Air Force also included aircraft and personnel of the Philippine Army Air Corps .
Outnumbered operationally more than three - to - one by aircraft of the Japanese Navy and Army , Far East Air Force was largely destroyed during the Philippines Campaign of 1941 -- 42 .
Initially the Far East Air Force also included aircraft and personnel of the Philippine Army Air Corps .