The correct answer is Iroquois Confederacy. In this concurrent resolution the US Congress agreed to acknowledge its contribution to democracy, government and constitutionalism. While other Indian Nations are also recognize, the Iroquois Confederacy had a its own political system prior to the arrival of British colonizers and it inspired the founding fathers to apply elements from this system to the constitution of the United States of America. The Iroquois Confederation or Six Nations, was formed by Cayuga Mohawk, Oneida, Onondaga, Seneca, and Tuscarora.