Battle of the Philippines
Established in November 1941 to provide air defense of Luzon, Philippine Islands. After Japanese invasion on 24 December 1941, mission changed to provide ground defense of island, with ground and air echelon personnel of unequipped Fifth Air Force units on Luzon attached to fight as ground infantry units during the Battle of the Philippines (1941–42) after their aircraft were destroyed or evacuated to locations away from Luzon.