However, these areas were rapidly captured by Japanese forces, and the USAAF heavy bomber force in the Philippines was largely destroyed when Clark Air Base was attacked on 8 December 1941.
Namun, daerah-daerah tersebut dengan cepat direbut oleh pasukan Jepang, dan kekuatan sebagian besar pengebom berat USAAF di Filipina hancur ketika Pangkalan Udara Clark diserang pada tanggal 8 Desember 1941.