USMC

USMC
U.S. Government · Public domain · source
Name	United States Marine Corps
Founded	10 November 1775
Country	United States
Branch	Department of the Navy
Type	Marine force
Role	Expeditionary and amphibious operations
Garrison	The Pentagon
Nickname	Leathernecks, Devil Dogs
Notable commanders	John A. Lejeune, Smedley Butler, Chesty Puller, Alvin C. York

USMC

The United States Marine Corps traces its origins to Continental forces raised in 1775 and has served in conflicts from the American Revolutionary War through contemporary operations in Iraq War and War in Afghanistan (2001–2021). It operates alongside the United States Navy, United States Army, United States Air Force, and United States Space Force as a component of the United States Armed Forces, maintaining expeditionary, amphibious, and crisis-response capabilities for national leadership. Its heritage includes distinctive campaigns such as the Battle of Iwo Jima, Battle of Guadalcanal, and operations in the Korean War and Vietnam War, and it remains influential in doctrine, force structure, and joint operations.

History

The Corps was established by the Second Continental Congress and first deployed to actions like the Harbor of Nassau expedition. Early 19th-century engagements included the Barbary Wars and interventions in the Caribbean during the era of the Monroe Doctrine. In the late 19th and early 20th centuries Marines served in the Spanish–American War, the Philippine–American War, and the Boxer Rebellion. Influential commanders and theorists during that era and the interwar period shaped expeditionary doctrine alongside figures associated with the Banana Wars and operations in Haiti and Nicaragua. World War I service in campaigns such as the Battle of Belleau Wood garnered the Corps lasting recognition, while World War II amphibious warfare—seen at Tarawa, Saipan, and Okinawa—helped define modern Marine doctrine. Cold War crises led to deployments during the Korean War and the Vietnam War, and later contingencies included operations in Lebanon (1982–1984), Operation Urgent Fury, and Operation Just Cause. Post-9/11 deployments encompassed Operation Enduring Freedom and Operation Iraqi Freedom, affecting force structure and doctrine into the 21st century.

Organization and structure

The Corps is organized into numbered Marine Expeditionary Forces (MEF) and subordinate Marine Expeditionary Brigades (MEB) and Marine Expeditionary Units (MEU), aligned with marine divisions, aircraft wings, and logistics groups. Key institutional elements include Headquarters at The Pentagon, training commands at Marine Corps Recruit Depot Parris Island and Marine Corps Recruit Depot San Diego, and schools such as Marine Corps University and The Basic School at Marine Corps Base Quantico. Operational units integrate with the United States Navy carrier and amphibious groups and coordinate with commands like United States Indo-Pacific Command, United States Central Command, and United States European Command. The chain of command connects the Secretary of the Navy and the Secretary of Defense to combatant commanders under statutory frameworks such as the National Defense Authorization Act.

Roles and missions

Designed for rapid response, the Corps executes amphibious assaults, expeditionary advanced base operations, sea control missions, and crisis response. It supports power projection from the sea alongside United States Navy amphibious ships such as Wasp-class amphibious assault ship and America-class amphibious assault ship, and conducts littoral operations, noncombatant evacuation operations, humanitarian assistance, and security force assistance. Doctrine influences and is influenced by joint publications and interservice concepts developed with institutions like the Joint Chiefs of Staff and training exercises such as Talisman Sabre and RIMPAC. The Marine Corps also contributes to special operations through elements that coordinate with United States Special Operations Command and partner forces during multinational operations with allies including United Kingdom, Australia, and Japan.

Equipment and aviation

Ground equipment portfolios include infantry small arms, armored vehicles such as the Light Armored Vehicle (LAV), the M1 Abrams, and amphibious platforms like the Amphibious Combat Vehicle. Logistics and sustainment leverage vehicles, artillery, and engineering systems compatible with ship-to-shore movement aboard assault ships and amphibious transport docks such as San Antonio-class amphibious transport dock. Aviation assets include rotary-wing platforms like the CH-53E Super Stallion and AH-1Z Viper, tiltrotor aircraft like the Bell Boeing V-22 Osprey, and fixed-wing platforms transitioning toward the F-35B Lightning II for short takeoff/vertical landing operations. Integration with naval aviation and carrier strike groups, as well as use of forward arming and refueling points, supports expeditionary reach and sustainment for distributed maritime operations.

Training and education

Recruit training occurs at facilities such as Marine Corps Recruit Depot San Diego and Marine Corps Recruit Depot Parris Island, followed by occupational training at schools including School of Infantry and Marine Aviation Training Support Group. Officer accession paths include programs run by Officer Candidates School, Naval ROTC, and the United States Naval Academy, with professional military education provided by Marine Corps University and advanced courses at Command and Staff College. Training emphasizes marksmanship, small-unit tactics, amphibious operations, and combined-arms integration, reinforced through large-scale exercises like Exercise Bright Star and joint live-fire events with partner services and nations.

Traditions and culture

The Corps maintains distinct traditions such as the Eagle, Globe, and Anchor emblem, the Marines' Hymn, and customs tied to recruit depots and unit lineage like the 4th Marine Division and the 1st Marine Division. Historical figures and Medal of Honor recipients, and events such as the Flag raising on Iwo Jima, contribute to institutional identity and ceremonial practices including observances on 10 November. Leadership ethos draws from notable leaders and published histories connected to figures and texts that shape esprit de corps across units, museums, and memorials like the National Museum of the Marine Corps and the Marine Corps War Memorial.

Category:United States military