26th Marine Regiment

26th Marine Regiment
Unit name	26th Marine Regiment
Dates	1944–1949; 1966–1969
Country	United States
Branch	United States Marine Corps
Type	Infantry regiment
Role	Amphibious warfare, Expeditionary warfare, Counterinsurgency
Size	Regiment
Command structure	5th Marine Division; 1st Marine Division
Garrison	Camp Lejeune
Battles	Battle of Iwo Jima, Vietnam War, Battle of Khe Sanh
Notable commanders	Harry B. Liversedge, John H. Russell Jr.

26th Marine Regiment

The 26th Marine Regiment was an infantry regiment of the United States Marine Corps activated during World War II and reactivated for service in the Vietnam War. It participated in major operations including the Battle of Iwo Jima and the defense of Khe Sanh Combat Base, serving under commands such as the 5th Marine Division and the 1st Marine Division. The regiment earned multiple unit citations and individual awards while producing leaders who later served at corps and joint levels.

History

Activated in 1944 as part of the 5th Marine Division during the Pacific campaign, the regiment trained at Camp Pendleton and embarked from San Diego, California for operations in the Pacific Theater. During World War II, the regiment assaulted Iwo Jima in February 1945, fighting alongside units from the 3rd Marine Division, elements of the United States Army, and supporting assets from the United States Navy. After occupation duties in the Japanese home islands and demobilization at Camp Lejeune following V-J Day, the regiment was inactivated in 1949 during postwar reductions.

Reactivated in 1966 amid the escalation of the Vietnam War, the regiment deployed to the Republic of Vietnam under the III Marine Amphibious Force and later operated as part of the 1st Marine Division. Its elements rotated between firebases and coastal operations along I Corps and were integral to Operation Hastings-era doctrines and later counterinsurgency actions. The regiment was again deactivated in 1969 during force realignments concurrent with Vietnamization and U.S. troop withdrawals.

Organization and Structure

The regiment followed standard Marine infantry regimental organization with three infantry battalions, a headquarters company, and attachments for artillery, reconnaissance, and combat support. Subordinate units historically included the 1st, 2nd, and 3rd Battalions, each organized into rifle companies and weapons companies trained for amphibious assault and sustained ground combat. During World War II the regiment integrated with division artillery such as the 13th Marines and coordinated with naval gunfire from United States Navy battleships and carrier task forces.

In Vietnam, the regiment operated with attached armor, aviation, and artillery units from commands including the 3rd Marine Aircraft Wing, 1st Marine Aircraft Wing, and elements of the 2nd Battalion, 12th Marines for fire support. Command relationships shifted between the III Marine Amphibious Force, 1st Marine Division, and combined joint task forces depending on operational requirements, reflecting Marine Corps modularity and expeditionary doctrine derived from earlier amphibious campaigns.

Combat Operations

In February–March 1945 the regiment landed on Iwo Jima where it fought in the volcanic terrain against entrenched forces of the Imperial Japanese Army and defended captured shorelines for follow-on operations. The regiment participated in close-quarters assaults, coordinated infantry-artillery strikes with units of the Amphibious Corps, Pacific Fleet, and helped secure airfields critical for B-29 Superfortress operations.

During the Vietnam deployment the regiment engaged in large-unit operations, firebase defense, patrols, and pacification support across Quảng Trị Province and surrounding areas. Notably, elements of the regiment were involved in the protracted defense of Khe Sanh Combat Base, conducting perimeter defense and counterattack missions against People's Army of Vietnam forces during the 1968 siege. The regiment also participated in search-and-destroy operations, coordination with Army of the Republic of Vietnam units, and combined operations with U.S. Army and Royal Australian Army units at times.

Notable Commanders and Personnel

The regiment’s World War II and Vietnam-era leaders included officers who later held senior command and staff positions. Among them were commanders with prior service in Guadalcanal, Bougainville, and other Pacific campaigns who brought amphibious experience to later doctrine. Several company and battalion commanders received personal decorations such as the Medal of Honor, Navy Cross, and Silver Star during separate actions in which regiment members took part. Noncommissioned officers and junior officers from the regiment later served in high-level billets across the United States Marine Corps and joint commands.

Unit Honors and Decorations

The regiment and its subordinate units received multiple unit awards and campaign streamers for service during the World War II Pacific campaign and the Vietnam War. Elements were cited in unit commendations and received campaign credit for operations including Iwo Jima, Tet 1968 operations, and the Khe Sanh defense. Individual Marines were recognized with high decorations such as the Medal of Honor, Navy Cross, Silver Star, and Bronze Star Medal for gallantry during combat actions associated with the regiment’s operations.

Insignia and Traditions

The regiment adopted standard Marine Corps insignia elements aligned with infantry regimental heraldry, reflecting ties to the 5th Marine Division during World War II and later traditions from Vietnam service. Unit colors, guidons, and distinctive emblems were displayed during ceremonies at installations such as Marine Corps Base Camp Pendleton and Marine Corps Base Camp Lejeune, and the regiment observed traditions of amphibious assault that trace to historic Marine Corps operations including Belleau Wood legacy customs. Annual reunions, memorials at Iwo Jima Memorial-related sites, and colonial-era ceremonial practices preserved the regiment’s lineage within Marine Corps history.

Category:Infantry regiments of the United States Marine Corps Category:United States Marine Corps in World War II Category:United States Marine Corps units of the Vietnam War