Question: Wilhelm O. Philipsen served as blackmith in a historical unit of the United States Army, that began its service in the decade prior to what war?
Sentence (from "Wilhelm O. Philipsen"): He was among 10 cavalrymen who volunteered to form a skirmish line on September 29, 1879 while Company D retreated from an attack by the White River Utes.
Relevant evidence: No