In 1862, Minnesota was still a young state, part of a frontier inhabited by more than one million Indians. Times were hard and Indian families hungry. When the U.S. government broke its promises, some of the Dakota Indians went to war against the white settlers. Many Dakota did not join in, choosing to aid and protect settlers instead. The fighting lasted six weeks and many people on both sides were killed or fled Minnesota. Former Minnesota governor Henry Sibley led an expedition of soldiers and Dakota scouts against the Dakota warriors. The war ended on December 26, 1862, when thirty-eight Dakota Indians were hanged in Mankato in the largest mass execution in U.S. history. Afterward, the government forced most of the remaining Dakota to leave Minnesota. For white Minnesotans, their experience of blood and terror negated all promises they had made to the Dakota. Stories and history books told about the great "Minnesota Massacre," but for many years the Indian side of the story was ignored.