The Beaver Wars (Mohawk: Tsianì kayonkwere, pronounced [d͡ʒanî gajũgwere]), also known as the Iroquois Wars or the French and Iroquois Wars (French: Guerres franco-iroquoises), were a series of conflicts fought intermittently during the 17th century in North America throughout the Saint Lawrence River valley in Canada and the Great Lakes region which pitted the Iroquois (Haudenosaunee) against the Wendat, northern Algonquians and their French allies. As a result of this conflict, the Iroquois destroyed several confederacies and tribes through warfare: the Wendat or Hurons, Erie, Neutral, Wenro, Petun, Susquehannock, Mohican and northern Algonquins whom they defeated and dispersed, some fleeing to neighbouring peoples and others assimilated, routed, or killed.
The Iroquois sought to expand their territory to monopolize the fur trade with European markets. They originally were a confederacy of the Mohawk, Oneida, Onondaga, Cayuga, and Seneca tribes inhabiting the lands in what is now Upstate New York along the shores of Lake Ontario east to Lake Champlain and Lake George on the Hudson River, and the lower-estuary of the Saint Lawrence River. The Iroquois Confederation led by the Mohawks mobilized against the largely Algonquian-speaking tribes and Iroquoian-speaking Wendat (Huron) and related tribes of the Great Lakes region. The Iroquois were supplied with arms by their Dutch and English trading partners; the Algonquians and Wendat were backed by the French, their chief trading partner.