OVERVIEW: Rangers are elite, rapid-deployment U.S. Army light infantry units skilled in direct-action raids, airfield seizures, special reconnaissance, and overseas contingency operations. They operate in small teams with exceptional physical stamina, tactical flexibility, and airborne mobility.

DETAILS: The term “Ranger” dates to George Washington’s 18th-century colonial scouts and gained prominence in WWII with six battalions modeled after British Commandos under Maj. William O. Darby. Modern Rangers were reactivated during the Korean War in 1950 and reorganized into the 75th Infantry Regiment (Ranger) in 1954, later becoming the 75th Ranger Regiment in 1986. Composed of three active-duty battalions and a training brigade, the Regiment selects via the 8-week RASP course and Ranger School—a 61-day combat leadership pipeline combining airborne, mountain, and jungle phases. Rangers serve in 12-man platoons and specialize in raids, direct action, airfield seizure, and special reconnaissance under global deployment.

FUNCTION: Ranger units infiltrate hostile territory by air, land, or sea to conduct quick-strike operations, secure or destroy key infrastructure, gather intelligence, and support larger operations. They are often among the first forces in and out, capable of coordinating joint-force assets such as aviation, artillery, and special operations support.

NOTE:
IOC: May 1942 (1st Ranger Battalion WWII), 31 January 1974 (modern 75th Ranger Regiment)
Operators: United States Army (75th Ranger Regiment)
Structure: Three active battalions (1st, 2nd, 3rd), Ranger Training Brigade (4th–6th battalions), Regimental Headquarters; based at Fort Moore, GA
Platforms: Rotary and fixed-wing aircraft (C-130, C-17, helicopters), parachute, fast-roped helos
Conflict used in: World War II (North Africa, Normandy, Philippines), Korean War (1950), Vietnam War (1969 LRRP), Grenada (1983), Panama (1989), Gulf War (1991), Somalia (1993), Afghanistan/Iraq (2001–present), countless global operations

SOURCE: Britannica: https://www.britannica.com/topic/ranger-military ; Military.com: https://www.military.com/special-operations/army-ranger-missions-and-history.html ; Wikipedia: https://en.wikipedia.org/wiki/United_States_Army_Rangers ; U.S. Army (army.mil Ranger school page); Wikipedia: https://en.wikipedia.org/wiki/Ranger_Assessment_and_Selection_Program