In September, Oliver Hazard Perry destroyed most of the British fleet at the Battle of Lake Erie, taking control of the lake. This made the British army, then at Fort Malden (now Amherstburg, Ontario) vulnerable to having its supply lines cut. The British, under General Henry Procter, withdrew to the northeast, pursued by Harrison, who had advanced through Michigan while Johnson kept the Indians engaged. The Indian chief Tecumseh and his allies covered the British retreat, but were countered by Johnson, who had been called back from a raid on Kaskaskia that had taken the post where the British had distributed arms and money to the Indians. Johnson's cavalry defeated Tecumseh's main force on September 29, took British supply trains on October 3, and was one of the factors inducing Procter to stand and fight at the Battle of the Thames on October 5, as Tecumseh had been demanding he do. One of Johnson's slaves, Daniel Chinn, accompanied Johnson to the battle.