Administrative Order of Battle of the Philippine Army – December 1948
I Corps – HQ, Fort Natividad (Tarlac)
Second Infantry Division (Fort Gregorio, Baguio)
Sixth Infantry Division (Fort Natividad, Tarlac)
Ninth Infantry Division (Camp Gabaldon, Nueva Ecija)
2nd Mechanized Brigade (Fort Natividad, Tarlac)
3rd Mechanized Brigade (Fort Gregorio, Baguio)
First Armored Regiment (Camp San Felipe, Pangasinan)
Second Armored Regiment (Camp Cabanatuan, Nueva Ecija)
Corps Assets
First Parachute Regiment (Camp Cabanatuan, Nueva Ecija)
Scout Ranger Regiment (Camp Tecson, San Miguel, Bulacan)
30th Field Artillery Regiment (12 x 150mm M1934 howitzer, 12 x 150mm M1934 gun)
40th Field Artillery Regiment (12 x 150mm M1934 howitzer, 12 x 150mm M1934 gun)
32nd Antiaircraft Artillery Brigade (Fort Natividad, Tarlac)
21st Tank Brigade (Fort Natividad, Tarlac)
51st Engineer Regiment
Subordinate Commands
Coast Defenses of Northern Luzon
32nd Antiaircraft Artillery Brigade (Fort Natividad, Tarlac)
33rd Antiaircraft Artillery Brigade (Camp Mabayuan, Zambales)
II Corps – HQ, Fort Bonifacio (Taguig)
First Infantry Division (Fort Bonifacio, Taguig)
Fifth Infantry Division (Fort Aguinaldo, Manila)
Tenth Infantry Division (Camp Santo Tomas, Batangas)
1st Mechanized Brigade (Santolan Barracks, Manila)
Corps Assets
31st Antiaircraft Artillery Brigade (Santolan Barracks, Manila)
53rd Field Artillery Brigade (Camp Pito Abat, Camarines Sur)
20th Field Artillery Regiment (12 x 150mm M1934 howitzer, 12 x 150mm M1934 gun)
50th Field Artillery Regiment (12 x 150mm M1934 howitzer, 12 x 150mm M1934 gun)
52nd Engineer Regiment
Subordinate Command
Harbor Defenses of Manila Bay
III Corps – HQ, Fort Panacan (Davao, Mindanao)
Third Infantry (Light, Mountain) Division (Fort Navarro, Zamboanga, Mindanao)
Fourth Infantry (Light, Mountain) Division (Fort Peralta, Bacolod, Negros)
Seventh Infantry (Light, Mountain) Division (Fort Angeles, Tacloban, Leyte)
Eighth Infantry (Light Mountain) Division (Fort Panacan, Davao, Mindanao)
Corps Assets
23rd Field Artillery Battalion (12 x 105mm M1933 howitzer)
24th Field Artillery Battalion (12 x 105mm M1933 howitzer)
31st Engineer Regiment
Subordinate Commands
First Civic Action Group (Fort Navarro, Zamboanga, Mindanao)
Second Civic Action Group (Fort Panacan, Davao, Mindanao)