About this Unit
The 1st Battalion, 503rd Infantry Regiment (1/503d INF) traces its origins to World War II as part of the 503rd Parachute Infantry Regiment, known for its historic airborne assaults in the Pacific Theater. The unit later became attached to the 2nd Infantry Division (2ID), serving with distinction in various conflicts, including the Vietnam War, where it earned numerous commendations for its bravery and effectiveness in combat. Over the decades, 1/503d INF has participated in multinational training exercises and operations, reinforcing its reputation as a premier light infantry force. Today, the battalion continues to uphold its proud legacy, demonstrating readiness and professionalism as part of the U.S. Army’s global commitments.
Historical Facts
•
Origins in World War II: The 1st Battalion, 503rd Infantry Regiment traces its roots back to the 503rd Parachute Infantry Regiment (PIR), activated in 1942 and famously involved in the recapture of Corregidor in the Philippines during World War II.
•
First Airborne Assault on Corregidor: Elements of the 503rd PIR (predecessor) executed the first and only combat parachute assault on Corregidor Island in February 1945, a daring operation that played a pivotal role in liberating the Philippines from Japanese control.
•
Vietnam War Service: The battalion fought in Vietnam as part of the 173rd Airborne Brigade, earning a Presidential Unit Citation for its actions during the Battle of Dak To in 1967, one of the fiercest battles of the conflict.
•
Integration with 2nd Infantry Division: In 1986, the 1st Battalion, 503rd Infantry was assigned to the 2nd Infantry Division, solidifying its presence in Korea and taking on the mission of defending the Korean Peninsula.
•
“First Rock” Nickname: The unit is nicknamed “First Rock,” a play on its numerical designation and a nod to airborne strength and resilience.
•
Key Role in DMZ Defense: Stationed at Camp Casey and Camp Hovey, Korea, 1-503d has been a “tip of the spear” force on the Korean DMZ, maintaining readiness against potential North Korean aggression.
•
Humanitarian Assistance: Beyond combat, 1-503d has participated in humanitarian operations in South Korea, supporting local communities during natural disasters and fostering US-ROK relations.
•
Global Deployments: While assigned to 2ID, 1-503d soldiers have deployed to Iraq and Afghanistan in support of Operation Iraqi Freedom and Operation Enduring Freedom, continuing their legacy of global service.
•
Notable Alumni: Medal of Honor recipient Specialist Four Leslie H. Sabo Jr. served with the 1/503rd in Vietnam, recognized for extraordinary heroism during combat operations in 1970.
•
Distinctive Unit Insignia: The battalion’s insignia features a winged sword, symbolizing its airborne heritage and its commitment to rapid deployment and combat readiness.
