Question: Charles Albert Varnum received a Medal of Honor for his role in a conflict at Drexel Mission following a massacre that occured on what Indian reservation?
Sentence (from "Wounded Knee Massacre"): The Wounded Knee Massacre (also called the Battle of Wounded Knee) occurred on December 29, 1890, near Wounded Knee Creek (Lakota: "Čhaŋkpé Ópi Wakpála") on the Lakota Pine Ridge Indian Reservation in the U.S. state of South Dakota.
Relevant evidence: Yes