The most dramatic conflict was the Sioux war in Minnesota in 1862 when Dakota tribes systematically attacked German farms to drive out the settlers. For several days, Dakota attacks at the Lower Sioux Agency, New Ulm and Hutchinson, slaughtered 300 to 400 white settlers. The state militia fought back and Lincoln sent in federal troops. The ensuing battles at Fort Ridgely, Birch Coulee, Fort Abercrombie, and Wood Lake punctuated a six-week war, which ended in an American victory. The federal government tried 425 Indians for murder, and 303 were convicted and sentenced to death. Lincoln pardoned the majority, but 38 leaders were hanged.