Treaty of St. Mary's (1818)

The Treaty of St. Mary's may refer to one of six treaties concluded in fall of 1818 between the United States and Natives of central Indiana regarding purchase of Native land. The treaties were

• Treaty with the Wyandot, etc.
• Treaty with the Wyandot
• Treaty with the Potawatomi
• Treaty with the Wea
• Treaty with the Delaware
• Treaty with the Miami

The main treaty was with the Miamis, who were the main tribe in Indiana. Unqualified references to the treaty usually refer to this one. The treaties acquired a substantial portion of the land area (dubbed the New Purchase) of the state of Indiana from the Miami, Delaware, Potawatomi, and others in exchange for cash, salt, sawmills, and other goods, effectively moving the northern boundary of the state from near the Ohio River to the Wabash River in the northwest and north. They also resulted in creation of Indian reservations and continued the process of Indian removals in Indiana begun by the Treaty of Greenville in 1795.