MN Indian War: “Citizen Soldiers engaged in the Sioux Indian war of 1862”. The St. Peter Frontier Guards were on duty at New Ulm, Minnesota, during the Indian War, from 19 Aug 1862 until 26 Aug 1862. Part of this company was in the first, and all of it in the second, battle of New Ulm. Private. Sources: (MCIW p756)