US Army Philippines January 15, 1942
After the retreat into Bataan the US Army Far East is reorganized into 3 Corps plus a general reserve. Over 12,000 men were lost due to death, wounds, capture or are simply missing as a result of the fighting at the beachheads and in the delaying action that followed.
To make good those losses, the 4th Engineer Brigade has both of its regiments converted into infantry and assigned to the mauled 21st Infantry Division (which lost 6 battalions in its fight from Lamon Bay to Bataan), while each of the remaining engineer brigades have 2 battalions each disbanded to provide infantry replacements. The American rear area personnel are combed out to provide replacements for the 31st Infantry Regiment, 65th Infantry Regiment, and 112th Cavalry Regiment so that for a brief time in mid January all of the combat units are at full strength.
Eisenhower establishes his forward headquarters at Mariveles, sends General Ord to command the rear area at Corregidor, and gives Wainwright tactical command of the forces on Bataan, with General King commanding the I Corps, General Parker commanding the II Corps and General Lim commanding III Corps. General Weaver remains in command of the 6th Cavalry Brigade, which has both cavalry regiments and both tank battalions assigned, as well as both engineer battalions from the 12th and 23rd Infantry Divisions. Brigadier General Beebe remains as Eisenhower's chief of staff.
However by January 20 Eisenhower is under pressure to move from the Philippines to Australia, as he has responsibility for all US Army forces not only in the Philippines, but also in the Dutch East Indies and Australia and although he delays as long as he can, by February 1 a Presidential Order from Washington DC arrives directing him to move his headquarters post haste.
US Army Bataan
I Corps (42,000 men)
12th Infantry Division (31st US, 57th PS, 13th PA), (11,000 men)
1st Philippine Infantry Division (1st PA, 2nd PA, 3rd PA)(11,000 men)
51st Philippine Infantry Division (51st PA, 52nd PA, 45th PS) (11,000 men)
Corps HQ and artillery (9,000 men)
II Corps (31,000 men)
11th Philippine Infantry Division (11th PA, 12th PA, 43rd PS) (11,000 men)
23rd Infantry Division (65th US, 47th PS, 53rd PA) (11,000 men)
Corps HQ and artillery (9,000 men)
III Corps (32,000 men)
21st Infantry Division (21st PA, 25th PA, 26th PA) (11,000 men)
101st Infantry Regiment (2,500 men)
1st Engineer Brigade (3,500 men)
2nd Engineer Brigade (3,500 men)
3rd Engineer Brigade (3,500 men)
1st Separate Battalion (USMC)(1,000)
Corps HQ and artillery (7,000 men)
USAFE rear area and reserve (7,000 men)
9th Cavalry Brigade (3,000 men, 60 tanks, 45 halftracks with 75mm guns)
service and support (4,000 men includes Navy and Army Air Force personnel)
total force 112,000 men
Manila Bay Defenses (General Moore)
Fort Mills (Corregidor), Fort Drum, Fort Hughes, Fort Frank (16,000 men) includes coast defense troops and the 91st Infantry Brigade (PA)
Cebu, Panay and Leyte Islands (Chynoweth) (17,000)
31st Philippine Infantry Division (11,000) (31st PA Cebu, 32nd PA Leyte, 33rd PA Panay)
plus 6,000 service and support personnel including Army Air Force and medical staff of evacuation hospital
Mindanao (Sharp) (13,000)
41st Philippine Infantry Division (11,000) (41st PA, 42nd PA, 43rd PA)
803rd Army Air Force Engineer battalion (1,000)
IV Corps HQ (2,000 men)
plus 2,000 service and support including Army Air Force and Navy personnel and staff of evacuation hospital