Following adoption of the Land Ordinance of 1785, American settlers began freely moving west across the Allegheny Mountains and into the Native American-occupied lands beyondland Great Britain had ceded to U.S. control at the end of the Revolutionary War (the Northwest Territory). As they did, they encountered unyielding and often violent resistance from a confederation of tribes. In 1789 (before Washington entered office), an agreement that was supposed to address the grievances of the tribes, the Treaty of Fort Harmar, was signed. This new treaty did almost nothing to stop the rash of violence along the frontier from confrontations between settlers and Native Americans and, the following year, Washington directed the United States Army to enforce U.S. sovereignty. Secretary of War Henry Knox ordered Brigadier General Josiah Harmar to launch a major offensive against the Shawnee and Miami Natives living in the region. In October 1790, his force of 1,453 men was assembled near present-day Fort Wayne, Indiana. Harmar committed only 400 of his men under Colonel John Hardin to attack a Native American force of some 1,100 warriors, who easily defeated Hardin's forces. At least 129 soldiers were killed.