Photograph of Mexican-American War cannon, nicknamed "Old Sacramento," that was captured by Free-State forces at the attack on Franklin, Kansas. On August 12, 1856, Free-Staters attacked Franklin, Kansas, and six proslavery settlers were killed. The attackers captured "Old Sacramento," the name given to a cannon used by Missourians in the Mexican-American War. The attack was a success in part because the Free-Staters managed to roll a wagon of hay up to the front of a building holding proslavery men, where they ignited the hay and threatened the building.