21st Infantry Regiment (United States)
Regiment
Fought in American Indian Wars Wikipedia
Movements
- April 12, 1861 – May 26, 1865 American Civil War
- April 21 – August 13, 1898 Spanish-American War
- July 3–17, 1898 Siege of Santiago
- February 4, 1899 – July 2, 1902 Philippine-American War
- September 1, 1939 – September 2, 1945 World War II
- June 25, 1950 – July 27, 1953 Korean War
- July 4, 1950 Battle of Osan
- July 14–21, 1950 Battle of Taejon
- November 1, 1955 – April 30, 1975 Vietnam War
- December 20, 1989 – January 31, 1990 United States invasion of Panama
- March 20 – May 1, 2003 2003 invasion of Iraq
- June 15, 2014 – April 16, 2026 Operation Inherent Resolve