Combined action program
Overview
 
Drawing from previous experience in "small wars", the United States Marine Corps
United States Marine Corps
The United States Marine Corps is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to deliver combined-arms task forces rapidly. It is one of seven uniformed services of the United States...

 operated the Combined Action Program during the Vietnam War
Vietnam War
The Vietnam War was a Cold War-era military conflict that occurred in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. This war followed the First Indochina War and was fought between North Vietnam, supported by its communist allies, and the government of...

, from 1965 to 1971. "The Combined Action Platoon's (CAP) genesis was not a deliberate plan from a higher headquarters, rather, it was a solution to one infantry battalion's problem of an expanding Tactical Area of Responsibility
Tactical Area of Responsibility
Tactical Area of Responsibility is a prescribed area in a theatre of combat which has been assigned to a unit commander who is responsible for, and has the authority to act on, the development and maintenance of installations and the conduct of tactical operations, area defence, coordination of...

 (TAOR). The concept of combining a squad of Marines with local Popular Forces
South Vietnamese Popular Force
During the Vietnam War, the South Vietnamese Popular Force consisted of local militias that protected their home villages from attacks by first National Front for the Liberation of South Vietnam forces and later by People's Army of Vietnam units...

 (PFs) and assigning them a village to protect proved to be a force multiplier."

While the exact implementation varied with the war and time, the basic model was to combine a Marine squad
Squad
In military terminology, a squad is a small military unit led by a non-commissioned officer that is subordinate to an infantry platoon. In countries following the British Army tradition this organization is referred to as a section...

 with local forces to form a village defense platoon
Platoon
A platoon is a military unit typically composed of two to four sections or squads and containing 16 to 50 soldiers. Platoons are organized into a company, which typically consists of three, four or five platoons. A platoon is typically the smallest military unit led by a commissioned officer—the...

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