| Unit Name: | South Luzon Force (II Philippine Corps) |
| Native Name: | Hukbong Timog Luzon |
| Dates: | November 4, 1941 - April 9, 1942 |
| Disbanded: | April 9, 1942 |
| Countries: | Commonwealth of the Philippines United States |
| Allegiance: | United States |
| Branch: | Army |
| Type: | Corps |
| Role: | South Luzon territorial defense force |
| Size: | 25,000 |
| Command Structure: | Luzon Force USAFFE |
| Garrison: | Limay, Bataan Fort William McKinley, Makati, Rizal |
| Battles: | Battle of Bataan Battle of Mauban Battle of Atimonan Battle of Bicol |
| Notable Commanders: | Major General George S. ParkerMajor General Albert Jones (Acting) |
South Luzon Force was a corps-sized unit of the US Army Forces Far East (USAFFE) active in the Philippines between 1941 and 1942. Created along with other 3 commands under the USAFFE, it was officially announced on November 4, 1941, and BGen. (Later MGen.) George M. Parker was appointed to command, making him responsible for the defense of Southern Luzon of any invasion. General Parker established his headquarters in Fort William McKinley in Rizal province.
He selected Col Stuart MacDonald as his Chief of Staff from December 8 to December 24, 1941, Colonel Louis R. Dougherty served as Chief of Staff from December 25, 1941 to January 13, 1942. Colonel Arnold J. Funk served as Chief of Staff from January 23 to March 2, 1942 before he was moved as Chief of Staff of Luzon Force. Colonel Charles Steele served as Chief of Staff from March 2 to April 9, 1942.
Comprising force staffs are the following officers and their designations in December 1941.
| II Corps[1] | Name | Rank | Designation |
|---|---|---|---|
| Ovid O. Wilson | Major | Assistant CS - G1 | |
| Dennis Moore | Major | Assistant CS - G2 | |
| Arthur Christensen | Captain | Assistant to the Assistant CS - G2 | |
| Howard D. Johnston | Lieutenant Colonel | Assistant CS - G3 | |
| Albert C. Wolfe | Major | Assistant to the Assistant CS - G3 | |
| John H. Bennett | Major | Assistant CS - G4 | |
| John Neiger | Captain | Aide to the Commanding General | |
| Thomas M. Tarpley Jr | Major | Adjutant General | |
| Hal C. Granberry | Major | Signal Officer | |
| William C. Chenoweth | Major | Engineer Officer | |
| Arthur L. Shreve | Lieutenant Colonel | Artillery Officer | |
| W. Hinton Drummond | Major | Surgeon | |
| Nicholas N. Milhailov | Lieutenant | Air Liaison Officer | |
| Kearie L. Berry | Lieutenant Colonel | Quartermaster and Ordinance Officer |
At the start of hostilities in December 1941 additional units was assigned to support. 2nd Provisional Group under LCol. David Babcock equipped with T12 Gun Carriage (75mm), Provisional Field Artillery Battalion from 88th Field Artillery, 515th Coast Artillery (AA), and Provisional Infantry Brigade under BGen. Simeon De Jesus, composing of Philippine Constabulary units of Southern Luzon.
1st Regular Division of Philippine Commonwealth Army under BGen. Fidel Segundo was reactivated as its reserve but got engaged to repulse Japanese landings in Mauban and Atimonan beaches.
General MacArthur ordered General Parker to go to Bataan to make all preparations as he is to implement WPO3, all forces will withdraw to Bataan. The command of South Luzon Force was temporary passed on to BGen. Albert Jones commander of 51st Division. After the withdrawal is completed both officers reverted to its old command. South Luzon Force is now renamed to II Philippine Corps.
II Philippine Corps surrendered on April 9, 1942, along with other forces in Bataan after General Edward King commander of Luzon Force surrendered to Japanese 16th Division. All marched from Mariveles, Bataan to San Fernando, Pampanga under the heat of the sun without food or water later known as Death March.