The Crow were generally allies with the northern Plains tribes of the Nez Perce, Kutenai, Shoshone, Kiowa and Kiowa Apache. They were also allies with the Flathead, although sometimes they had conflicts with them. The powerful Iron Confederacy ("Nehiyaw-Pwat"), an alliance of northern plains Indian nations developed as enemies of the Crow. It included the Plains Cree and Assiniboine peoples, and later included the Stoney, Saulteaux, Ojibwe, and Métis.