After William Hull's surrender of Detroit to the British during the War of 1812, General William Henry Harrison was given command of the U.S. Army of the Northwest. He set out to retake the city, which was defended by British Colonel Henry Procter, together with Tecumseh and his forces. A detachment of Harrison's army was defeated at Frenchtown along the River Raisin on January 22, 1813. Some prisoners were taken to Detroit, but Procter left those too injured to travel with an inadequate guard. His Native American allies attacked and killed perhaps as many as 60 wounded Americans, many of whom were Kentucky militiamen. The Americans called the incident the "River Raisin Massacre." The defeat ended Harrison's campaign against Detroit, and the phrase "Remember the River Raisin!" became a rallying cry for the Americans.