Question: United States Army post, Fort Elliott, was named for a casualty of the Battle of Washita River, which occurred on what day?
Sentence (from "Battle of Washita River"): The Battle of Washita River (also called Battle of the Washita or the Washita Massacre) occurred on November 27, 1868 when Lt. Col. George Armstrong Custer’s 7th U.S. Cavalry attacked Black Kettle’s Southern Cheyenne camp on the Washita River (near present-day Cheyenne, Oklahoma), part of a major winter encampment of numerous Native American tribal bands.
Relevant evidence: Yes