The United States Marine Corps' 3rd Battalion, 4th Marines (3/4) is an infantry battalion that has been part of the Corps' history since its activation on April 1, 1911, as part of the 4th Marine Regiment. With a rich legacy spanning over a century, this battalion has seen action in numerous conflicts, from World War I through to the present day, earning a reputation for valor and sacrifice. The battalion's insignia features the motto "Semper Fidelis" (Always Faithful), reflecting the enduring commitment of its Marines to the values of the Corps.
Early Years and World War I

Activated in 1911, the 4th Marine Regiment, to which the 3rd Battalion belongs, quickly became integral to the expanding Marine Corps, seeing its first major deployment during the Banana Wars in the Caribbean and Central America. The regiment’s early years were marked by a series of deployments aimed at protecting American interests abroad, a role that would become a hallmark of the Marine Corps’ expeditionary nature. As the United States entered World War I, the 4th Marines, including its 3rd Battalion, found themselves part of the American Expeditionary Forces in France, engaging in several pivotal battles, including the Battle of Belleau Wood, where they earned the nickname “Devil Dogs” from the German enemy.
Interwar Period and World War II
Following the end of World War I, the 3rd Battalion, 4th Marines, along with the rest of the Marine Corps, underwent significant changes, including reorganization and modernization efforts. The interwar period was marked by a return to expeditionary duties, with deployments in China and the Caribbean. As World War II loomed on the horizon, the battalion found itself once again preparing for combat, this time against the expanding Japanese Empire. The 3rd Battalion, 4th Marines, played a crucial role in several key battles in the Pacific Theater, including the Battle of Corregidor in the Philippines and the Guadalcanal Campaign, demonstrating the adaptability and resilience of Marine infantry in the face of relentless enemy opposition.
Battle | Date | Location |
---|---|---|
Battle of Belleau Wood | June 1-26, 1918 | France |
Battle of Corregidor | May 5-6, 1942 | Philippines |
Guadalcanal Campaign | August 7, 1942 - February 9, 1943 | Solomon Islands |

Vietnam War and Later Conflicts

The 3rd Battalion, 4th Marines, continued to see action in the decades following World War II, most notably during the Vietnam War. Deployed to Vietnam in 1965, the battalion was engaged in a series of operations against the North Vietnamese Army and the Viet Cong, including the Battle of Con Thien and Operation Buffalo. The battalion’s actions in Vietnam were characterized by the same tenacity and sacrifice that had come to define its legacy in previous conflicts. In the post-Vietnam era, the battalion has been involved in numerous other operations and deployments, including the Gulf War and more recent engagements in Afghanistan and Iraq, as part of the Global War on Terror.
Modern Era and Operational Readiness
Today, the 3rd Battalion, 4th Marines, remains a vital component of the United States Marine Corps, committed to the defense of the United States and its interests. The battalion continues to evolve, adapting to new technologies, tactics, and the changing nature of warfare. Its Marines undergo rigorous training to maintain operational readiness, capable of deploying at a moment’s notice to any corner of the globe. The battalion’s legacy serves as a testament to the enduring spirit of the Marine Corps and the sacrifices made by generations of Marines in defense of their country.
Key Points
- The 3rd Battalion, 4th Marines, has a storied history dating back to 1911, with participation in World War I, World War II, the Vietnam War, and more recent conflicts.
- The battalion is known for its combat prowess, earning numerous awards and decorations for its actions, including the French Croix de Guerre for its service in World War I.
- Throughout its history, the 3rd Battalion, 4th Marines, has demonstrated adaptability and resilience, evolving to meet the challenges of modern warfare while maintaining its expeditionary roots.
- The battalion's legacy is a testament to the sacrifices and valor of its Marines, who have consistently upheld the motto "Semper Fidelis" in the face of adversity.
- Today, the battalion remains a crucial part of the United States Marine Corps, committed to defending American interests and ready to deploy at a moment's notice.
As the world continues to evolve, with new challenges and threats emerging, the 3rd Battalion, 4th Marines, stands as a symbol of American military strength and the unwavering commitment of its Marines to the values of honor, courage, and commitment. Their story serves as a powerful reminder of the sacrifices made by those who serve and the enduring legacy of the United States Marine Corps.
What is the 3rd Battalion, 4th Marines' most notable engagement?
+The 3rd Battalion, 4th Marines, has been involved in numerous significant engagements throughout its history, but its actions during World War II, particularly in the Pacific Theater, are among its most notable. The Battle of Belleau Wood during World War I is also a pivotal moment in the battalion's history.
What awards has the 3rd Battalion, 4th Marines, received?
+The battalion has received numerous awards and decorations for its service, including the French Croix de Guerre, the Presidential Unit Citation, and the Navy Unit Commendation, among others. These awards reflect the battalion's valor and distinguished service in various conflicts.
What is the significance of the 3rd Battalion, 4th Marines' motto "Semper Fidelis"?
+"Semper Fidelis," meaning "Always Faithful," is the motto of the United States Marine Corps, adopted in 1883. For the 3rd Battalion, 4th Marines, this motto encapsulates the enduring commitment of its Marines to their country, their Corps, and each other, reflecting a tradition of loyalty, duty, and honor that has defined the battalion's actions throughout its history.
Meta Description: Discover the storied history of the 3rd Battalion, 4th Marines, from its activation in 1911 through its heroic actions in World War I, World War II, Vietnam, and beyond, showcasing the battalion’s unwavering commitment to “Semper Fidelis.”