Captain Marcellus Holmes Chiles (February 5, 1895 – November 5, 1918) was a United States Army officer who received the Medal of Honor for his actions during World War I, he suffered wounds that ultimately caused his death during those actions.
Chiles was born in Eureka Springs, Arkansas, to John Horne Chiles. He later moved to Denver, Colorado, where his father worked as a lawyer. He was a student at Colorado College when World War I began. After attending an officers' training camp, he was appointed a second lieutenant in the U.S. Army in August 1917.
Promoted to first lieutenant in January 1918, Chiles was sent to Europe with the 356th Infantry Regiment, 89th Division later that year. He first saw action at the Saint-Mihiel salient in northeast France in August 1918. On November 3, four days after being promoted to captain, Chiles participated in an advance near Le Champy Bas as part of the Meuse-Argonne Offensive. In command of a