The Iron Alliance (Nehiya Pwat) was a political and military alliance of several Indigenous nations in Canada and the northwestern United States. The four groups within this confederacy – Nêhiyawak/Plains Cree, Saulteaux/Plains
Ojibwe, Metis, and Nakoda/Stoney - had extensive kinship ties. The Confederacy rose to predominance during the height of the fur trade between the 1740’s and 1860’s. In the early 1820’s there was a call to gather at Buffalo Lodge Lake (present-day northwest North Dakota) to solidify the unity of the people. Many believe that the largest Sun Dance ever to occur on the Northern Plains took place.