21st Infantry

The 21st Infantry Regiment, known as the "Gimlet Regiment," was constituted in 1861 and first saw action during the American Civil War. Throughout its distinguished history, the unit fought in numerous major conflicts, including the Indian Wars, the Spanish-American War, World War II (notably in the Pacific Theater), the Korean War, and the Vietnam War. In Korea, the 21st Infantry gained recognition for its valiant stand during the Battle of Osan, marking the first American ground engagement of the war. Today, the regiment continues its legacy as part of the 25th Infantry Division, upholding its motto, "Duty."