One was an agreement between the United States of America and the Miami and their allies, the Wea tribes and the Shawnee, and was signed on June 6, 1803.

Harrison had been granted authority to settle the American claim to the Vincennes tract by President Thomas Jefferson.

The tract was ceded to Great Britain as part of the peace settlement after the French and Indian War.

George Rogers Clark captured the territory from the British in the American Revolutionary War, and the United States claimed the tract by right of conquest.

The fortified town of Vincennes, an old French trading post, was the primary settlement in the area.