River Raisin National Battlefield Park Weapon Demo Days! Demonstrations at 10am, 11am, 1pm, 2pm. Learn about black powder cannons, muskets and rifles used during the War of 1812. See the steps involved in preparing to fire a cannon with a cannon crew and learn the drilling techniques to fire a musket. Bring your ear plugs! July 13, August 10, September 14 & 28, 2013.