27th Infantry Regiment patch, WW1 Army Expeditionary Forces - Siberia

The 27th Infantry Regiment, nicknamed the "Wolfhounds", is a unit of the United States Army established in 1901, that served in the Philippine–American War, in the Siberian Intervention after World War I, and as part of the 25th Infantry Division ("Tropic Lightning") during World War II, the Korean War, and later the Vietnam War.