United States Army Forces in the Far East (USAFFE) was a military formation of the United States Army active from 1941 to 1946. The new command's headquarters was created on 26 July 1941, at No. 1, Calle Victoria, Manila, Luzon, the Philippines, with General Douglas MacArthur as commander. The Chief of Staff was Brigadier General Richard K. Sutherland and the Deputy Chief of Staff was Lieutenant Colonel Richard J. Marshall. The core of this command was drawn from the Office of the Military Advisor to the Commonwealth Government of the Philippines.
The 24th Field Artillery Regiment (Philippine Scouts) (24th FA (PS)) was a Philippine Scouts unit, part of the US Army's Philippine Division, formed in 1922 and active until April 1942. Antecedent units dated back to 1899.
The Philippines campaign, also known as the Battle of the Philippines or the Fall of the Philippines, was the invasion of the American territory of the Philippines by the Empire of Japan and the defense of the islands by United States and the Philippine Armies during World War II.
The Battle of Bataan was fought by the United States and the Philippine Commonwealth against Imperial Japan during World War II. The battle represented the most intense phase of the Japanese invasion of the Philippines during World War II. In January 1942, forces of the Imperial Japanese Army and Navy invaded Luzon along with several islands in the Philippine Archipelago after the bombing of the American naval base at Pearl Harbor.
The 41st Infantry Division was a division of the Philippine Army under the United States Army Forces in the Far East (USAFFE).
The 51st Infantry Division was a division of the Philippine Army under the United States Army Forces in the Far East (USAFFE).
The 31st Infantry Division was a division of the Philippine Army under the United States Army Forces in the Far East (USAFFE).
The 71st Infantry Division was a reserve division of the Philippine Army that fought under the United States Army Forces in the Far East (USAFFE). It was known for its fight with Japanese invading forces in Layac Junction, that was ordered to hold until all retreating Fil-American forces of crossed into Bataan Peninsula.
The 101st Infantry Division was one the reserve divisions of the Philippine Army under the United States Army Forces in the Far East (USAFFE)'s 10th Military district mainly entire island of Mindanao.
The North Luzon Force was a corps-sized grouping of the U.S.-sponsored Philippine Army, defeated in battle against the Japanese in 1941–42.
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. 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.
United States Forces in the Philippines (USFIP) is a unified command in the Philippines during World War II. It was the successor to the United States Army Forces in the Far East (USAFFE) which General Douglas MacArthur commanded. He moved to Australia as he evacuated as ordered by President Roosevelt in March 1942. The command only lasted two months as it surrendered by Lieutenant General Jonathan M. Wainwright to Lieutenant General Homma Masaharu commander of 14th Army of the Imperial Japanese Army.
On April 14, 1942 Kawaguchi Detachment who just landed in Lingayen, Pangasinan intended as reinforcement of the 14th Imperial Japanese Army to finally subdue Philippine-American forces in Bataan. However, General King surrendered days earlier before they arrived. Instead, General Homma Masaharu commander of 14th Army ordered them south to secure Cebu island in the Visayas intended as launching place for invasion of Mindanao after it is secured.
51st Field Artillery Regiment is a reserve unit of Philippine Commonwealth Army activated and organized in 1941 and fought during World War II. The regiment is a component of 51st Infantry Division under Brigadier General Albert M. Jones, responsible for the defense of Bicol Peninsula.
91st Field Artillery Regiment is a reserve unit of Philippine Commonwealth Army activated and organized in August 1941. It is part of 91st Infantry Division under Brigadier General Luther R. Stevens, PA who fought in Battle of Bataan. Whole regiment became POW after surrendering on April 9, 1942, to Japanese 14th Army.
21st Field Artillery Regiment, a unit of the 21st Infantry Division of the Philippine Army under the USAFFE, was mobilized on 18-November-1941, and was in action from December 1941 to 09-April-1942. The Division's area of responsibility covered La Union, Nueva Ecija, Tarlac and Pangasinan.
11th Field Artillery Regiment, was a unit of 11th Infantry Division of the Philippine Army under the USAFFE, mobilized in August 1941 but was equipped in November, and was in action December 1941 to April 9, 1942. Division's area of responsibility covered Ilocos Norte, Ilocos Sur, La Union, Cordillera, Cagayan, and Isabela.
301st Field Artillery Regiment, is a heavy artillery non-divisional unit of Philippine Commonwealth Army activated in November 1941 to be used as Corps Artillery. It was activated in Camp Del Pilar, Dau, Pampanga. It fought in Battle of Bataan inflicting heavy casualties to Japanese in Abucay-Mauban Line and Orion-Bagac Line.
41st Infantry Regiment, is a unit and formation activated and organization of Philippine Commonwealth Army. It was under 41st Infantry Division under Brigadier General Vicente Lim. It fought in during World War II in the Philippines, and fought valiantly and earned Presidential Unit Citation awarded by President Manuel Quezon.
71st Infantry Regiment is a reserve unit of Philippine Commonwealth Army under 71st Infantry Division activated and organized in Negros Island. It was transferred to Luzon island to bolster its defending forces during World War II. It fought in Northern Luzon and in Bataan where it defeated Japanese at the battle of points.
Philippines 
United States Army