オレンジ計画
It soon became apparent that a withdrawal to Bataan (as called for in War Plan Orange 3) was the best remaining option for Filipino and American forces, and from there, deny the use of Manila Bay by the Japanese. On December 24, 1941, USAFFE headquarters notified all unit commanders that "WPO-3 is in effect". With this, the withdrawal to the Bataan Peninsula began.