The Legion of the United States was engaged in several attacks on their convoys as the expedition pushed further into Native American strongholds, chiefly towards the Maumee Rapids. For a period of three years, starting on 25 June 1792, Fort Jefferson, along with the Legion ammunition supply trains en route to the fort, were under constant siege by native forces. Wayne deployed up to 500 soldiers to guard each supply convoy, with wide area security patrols and guards on the front, rear, and flanks. Anticipating War, Great Britain built Fort Miami south of Lake Erie in early spring 1794, and garrisoned it with 120 infantry and a detachment of 8 cannon. Wayne fumed at this act of aggression and reluctantly agreed to augment the Legion with Kentucky militia.