6th Battalion, 15th Artillery & 1 Battalion, 5th Artillery

**6th Battalion, 15th Artillery:** The 6th Battalion, 15th Artillery was originally constituted in the Regular Army as part of the 15th Field Artillery Regiment in 1916. The unit saw distinguished service during World War II and was later reactivated for service in the Vietnam War, providing direct artillery support to infantry and armored units. During Vietnam, the battalion participated in several major campaigns, earning commendations for its effective fire support. Over time, the battalion was inactivated and reflagged in accordance with Army restructuring. **1st Battalion, 5th Artillery:** The 1st Battalion, 5th Artillery traces its lineage to the 5th Artillery Regiment, which was organized in 1907 and has a heritage dating back to earlier artillery formations in the U.S. Army. The unit served with distinction in both World Wars, providing crucial firepower in major operations. In Vietnam, the battalion was restructured as an air defense artillery unit, playing a vital role in protecting friendly forces from aerial threats. The battalion's legacy continues today as part of the Army's air defense artillery branch.