A battalion is a military unit, typically consisting of 300 to 1,000 soldiers commanded by a lieutenant colonel, and subdivided into a number of companies. The typical battalion is built from three operational companies, one weapons company and one HQ company. In some countries, battalions are exclusively infantry, while in others battalions are unit-level organisations.
A company is a military unit, typically consisting of 100–250 soldiers and usually commanded by a major or a captain. Most companies are formed of three to seven platoons, although the exact number may vary by country, unit type, and structure.
Military ranks are a system of hierarchical relationships, within armed forces, police, intelligence agencies or other institutions organized along military lines. The military rank system defines dominance, authority, and responsibility in a military hierarchy. It incorporates the principles of exercising power and authority into the military chain of command—the succession of commanders superior to subordinates through which command is exercised. The military chain of command constructs an important component for organized collective action.
A fireteam or fire team is a small military sub-subunit of infantry designed to optimize "bounding overwatch" and "fire and movement" tactical doctrine in combat. Depending on mission requirements, a typical fireteam consists of four or fewer members: an automatic rifleman, a grenadier, a rifleman, and a designated team leader. The role of each fireteam leader is to ensure that the fireteam operates as a cohesive unit. Two or three fireteams are organized into a section or squad in co-ordinated operations, which is led by a squad leader. Historically, nations with effective fireteam organization have had a significantly better performance from their infantry units in combat than those limited to operations by traditionally larger units.
Corporal is a military rank in use in some form by the armed forces of many countries. It is also in use by some police forces or other uniformed organizations. The word is derived from the medieval Italian phrase capo corporale. The rank is usually the lowest ranking non-commissioned officer.
Colour sergeant is a rank of non-commissioned officer found in several armies and marine corps.
The School of Infantry (SOI) is the second stage of initial military training for enlisted United States Marines after recruit training. Since the initial training pipeline is divided between coasts, Marines from areas east of the Mississippi River usually graduate from MCRD Parris Island and move on to SOI at SOI East, while those from the western half of the nation attend MCRD San Diego and move on to SOI West at the Camp San Onofre area of Camp Pendleton in California. Female Marines are trained at both SOI East and SOI West. The School of Infantry's training mission ensures "Every Marine is, first and foremost, a Rifleman". At SOI, Marines with the Military Occupational Specialty of infantry are trained at the Infantry Training Battalion (ITB), while all non-infantry Marines are trained in basic infantry and combat skills at the Marine Combat Training Battalion. SOI marks a transition in the professional training of entry-level students from basically trained Marines to combat-ready Marines.
The United States Marine Corps Reconnaissance Battalions are the Special Operations Capable reconnaissance assets of Marine Air-Ground Task Force that provide division-level ground and amphibious reconnaissance to the Ground Combat Element within the United States Marine Corps. Division reconnaissance teams are employed to observe and report on enemy activity and other information of military significance in close operations. The Military Occupational Specialty code for Reconnaissance Marine is 0321.
In the United States Army, Marine Corps, Air Force and Space Force, major is a field officer above the rank of captain and below the rank of lieutenant colonel. It is equivalent to the naval rank of lieutenant commander in the other uniformed services. Although lieutenant commanders are considered junior officers by their services, the rank of major is that of a senior officer in the United States Army, the United States Marine Corps, and the United States Air Force.
3rd Battalion, 25th Marines (3/25) is a reserve infantry battalion in the United States Marine Corps. The battalion was first formed in 1943 for service in the Pacific Theater of Operations during World War II, taking part in a number of significant battles including those at Saipan and Iwo Jima before being deactivated at the end of the war. In the early 1960s, the unit was reactivated as a reserve battalion. Currently headquartered in Brook Park, Ohio with units throughout Ohio, Tennessee, and Pennsylvania, the battalion is nicknamed "three deuce five" and consists of approximately 800 Marines and Sailors. They fall under the 25th Marine Regiment and the 4th Marine Division. Recent operations have included tours in Iraq and Afghanistan.
1st Battalion, 4th Marines (1/4) is an infantry battalion in the United States Marine Corps based out of Marine Corps Base Camp Pendleton, California consisting of approximately 800 Marines and sailors. They fall under the command of the 1st Marine Regiment and the 1st Marine Division.
Thomas Elbert Creek was a United States Marine who posthumously received the Medal of Honor for heroism during February 1969 in Vietnam.
Emilio Albert De La Garza, Jr. was a United States Marine Corps lance corporal who was posthumously presented the nation's highest military honor — the Medal of Honor — for heroism above and beyond the call of duty on April 11, 1970, in South Vietnam during the Vietnam War.
A regimental combat team (RCT) is a provisional major infantry unit which has seen use by branches of the United States Armed Forces. It is formed by augmenting a regular infantry regiment with smaller combat, combat support and combat service support units.
3rd Battalion, 24th Marines (3/24) was a reserve infantry battalion in the United States Marine Corps. The battalion was first formed in 1943 for service in the Pacific Theater of Operations during World War II, taking part in a number of significant battles including those at Saipan and Iwo Jima before being deactivated at the end of the war. In the early 1960s, the unit was reactivated as a reserve battalion. It was located throughout the Midwestern United States and consisted of approximately 800 Marines and Sailors. The battalion was part of the 24th Marine Regiment and the 4th Marine Division. Recent operations included tours in Iraq and Afghanistan. On May 19, 2013, the battalion was deactivated (retired) as a part of 2013 Marine Corps Force Restructuring, along with the 24th Marine Regiment. 3/24 personnel were reallocated to 23rd Marine Regiment, with the majority of the companies becoming 3rd Battalion, 23rd Marines.
William Thomas Perkins Jr. was a United States Marine who posthumously received the United States' highest military decoration for valor — the Medal of Honor — for his heroic action on October 12, 1967, during the Vietnam War in which he smothered an exploding grenade with his body to save the lives of three fellow Marines. Perkins is the only combat photographer to have received the Medal of Honor.
The United States Marine Corps is organized within the Department of the Navy, which is led by the Secretary of the Navy (SECNAV). The most senior Marine commissioned officer is the Commandant of the Marine Corps, responsible for organizing, recruiting, training, and equipping the Marine Corps so that it is ready for operation under the command of the unified combatant commanders. The Marine Corps is organized into four principal subdivisions: Headquarters Marine Corps, the Operating Forces, the Supporting Establishment, and the Marine Forces Reserve.
The United States Marine Corps' Anti-Terrorism Battalion was a specialized infantry battalion and a Special Operations Capable (SOC) unit. The battalion was disbanded in 2013.
The structure of the United States Army is complex, and can be interpreted in several different ways: active/reserve, operational/administrative, and branches/functional areas.
