Fort Ridgely, Fairfax, Programs presented by historian John LaBatte on the U.S.-Dakota War of 1862. 1 p.m. Causes of the U.S.-Dakota War of 1862. 2 p.m. Acton-A Murder Mystery. Learn about the spark that set off the U.S.-Dakota War of 1862 in Acton Township, Meeker County. 3 p.m. Battlefield Tour. Fort Ridgely was attacked twice during the U.S.-Dakota War. Learn about those battles in this tour led by John Labatte.