Mazomani, a leader of the Wahpeton Dakota, died of injuries received on September 23, 1862, at the battle of Wood Lake during the Dakota War. Also known as Iron Walker, he was among the Dakota leaders who went to Washington DC in 1858 to negotiate a treaty selling half of the Minnesota River Valley reservation. During the tragic 1862 war, he repeatedly tried to make peace between the Dakota and whites and to protect Dakota who had chosen to remain at peace from those who tried to force them to fight. According to Dakota oral traditions, white soldiers wounded him while he carried a flag of truce and tried to enter their camp to arrange for the release of captives. Friends and followers carried him from the battlefield to a nearby camp, where he died early the following morning after embracing his wife and daughter and telling them, “I love you very much, but I am going to leave you now.” His daughter, Mazaokiyewin, also called Woman who Talks to Iron, was among the many Dakota forced into exile at Crow Creek on the Missouri River after the 1862 war. She eventually returned to this region, where she was known as Isabel Roberts and became a leading member of the Dakota community, and many of her descendants still live in the area today.