Sitting Bull stopped his warriors and said, "This boy is too brave to die! I take him as my brother." While living with the Lakota they gave him the name Little Assiniboine and later changed it to Stays Back, because of his unwillingness to return to the Assiniboine. Sitting Bull later changed it to Jumping Bull after his father, who had been dealing with a toothache throughout the day when a war party of Crows attacked them, jumped on his horse chasing after the raiders and was killed by a Crow Chief. Sitting Bull was not in camp and upon his return learned of his fathers fate. In his anger he went after the Crows and killed their Chief, when he returned he pointed at Stays Back and said "from now on your name is Jumping Bull!" Jumping Bull stayed loyal to Sitting Bull and later died alongside him at Standing Rock in 1890 while attempting to defend him. Iron Confederacy The Assiniboine were a major part of an alliance of northern Plains Indian nations known as the Iron Confederacy, or , as it is known in Plains Cree, beginning prior to 1692 until the late nineteenth century. The Iron Confederacy were allies in the fur trade, particularly with the Hudson's Bay Company. The Assiniboine and the Cree () being important intermediaries in the Great Plains trading networks. Members included the Assiniboine, Stoney ( or ), the Plains and Woodland Cree, Saulteaux (called ), as well as Métis (), and individual Iroquois people who traveled west as employees for the fur traders. Loosely associated for military shelter against the Blackfoot and to ensure safe access to the prairies for the bison hunt were Plateau tribes such as Bitterroot Salish (Flathead) (), Kutenai, Sekani, Secwepemc, and Nez Perce (). Other Indian peoples on the northern plains, such as the Gros Ventre (), were occasionally part of the confederacy. The confederacy became the dominant force on the northern plains. It posed a major threat to Indian nations not associated with it, such as the Shoshone () and Crow ( or = "enemies") further south. Their most mighty and most dangerous enemy, however, were their former trading partner the Blackfoot Confederacy ( = Blackfeet or = "enemies"). The kindred Sioux peoples () and their allies, the Arapaho () and Cheyenne (), were also enemies. The Iron Confederacy also attacked European-American settlements on the