Raisin River, Massacre of, a mass killing at Frenchtown (now Monroe, Michigan) on the banks of the Raisin River during the War of 1812. In January, 1813, General James Winchester sent a detachment of Kentucky troops to expel the British from Frenchtown. The move was successful, and Winchester moved all his men into the village. In a surprise attack, Colonel Henry Proctor, commanding 1,500 British and Indians, forced Winchester to surrender. Proctor then withdrew, taking with him all able-bodied prisoners but leaving 30 sick and wounded Americans behind. The Indians killed all 30.