George M. Parker was appointed to command, making him responsible for the defense of Southern Luzon of any invasion.

Vicente Lim (formerly Philippine Army Vice Chief of Staff) covering Southern Tagalog region, 51st Division under BGen.

Albert Jones covering Bicol Peninsula, and 71st Division (unit from Visayas) under Col. (BGen) Clyde Selleck as reserve.

Simeon De Jesus, composing of Philippine Constabulary units of Southern Luzon.

Fidel Segundo was reactivated as its reserve but got engaged to repulse Japanese landings in Mauban and Atimonan beaches.