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 26th Cavalry Regiment (Philippine Scouts) (26th CAV (PS)) was part of U.S. Army Forces Far East's Philippine Department, during World War II. The 26th engaged in the last cavalry charge in the history of the U.S. cavalry. The American Battle Monuments Commission list 301 dead who were members of this regiment interred at Manila American Cemetery and Memorial.
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 1st Infantry Division, Philippine Army, nicknamed Tabak Division, is the Philippine Army's primary infantry unit, and specializes in anti-guerrilla warfare. The division has been involved in combating terrorists in Southern Mindanao.
The 2nd Infantry Division, Philippine Army nicknamed Jungle Fighter, is the Philippine Army's primary infantry unit specializing in jungle warfare.
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). It fought in Southern Luzon and in Bataan until it surrendered in April 9, 1941.
The 11th Infantry Division was one the reserve division of the Philippine Army that was mobilized in September 1941 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.
Luzon Force or Bataan Defense Force is a short-lived Field Army size unit created in the Philippines after the restructure of command organized by General Douglas MacArthur commander of US Army Forces in the Far East (USAFFE). He wished to control the 4 Commands from Australia with its representative in Corregidor Island. Major General Jonathan M. Wainwright IV was selected to command as the senior general officer in Bataan peninsula.
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.
74th Infantry Regiment is a provisional unit activated and organized in Negros during World War II after all units of 71st Infantry Division was transferred to Luzon and Mindanao. It was comprised mostly of reserve out of ROTC cadets and recruits within Negros Island. It was activated after Headquarters, Philippine Army authorized in December 1941.
71st Field Artillery Regiment was a military unit of Philippine Army activated in 1941 as part of 71st Infantry Division. It fought in Luzon during Japanese landing and also in Bataan. All officers and men was captured during surrender of Fil-American forces in Bataan on April 9, 1942.
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.
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.
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.
72nd Infantry Regiment, is a reserve military unit and formation of Philippine Commonwealth Army who fought during World War II in Northern Luzon and in Bataan Peninsula. 72nd Infantry was under 71st Division and was first designated as reserve unit of North Luzon Force under Major General Jonathan M. Wainwright IV, USA that can only be committed if permitted from USAFFE Headquarters.
Philippines 
United States Army 
Philippine Commonwealth Army