Fort Ridgely was built in 1851. It wasn't much of a fort though, but it was the only military post between the Sioux Reservations and the settlers. On August 18, 1862, the Lower Sioux Agency was attacked. About 67 whites were there. Within a few hours 20 had been killed, and 10 captured. The remaining 47 reached fort Ridgely. Mr. J.C. Dickinson led his family in a wagon to Fort Ridgely, nobody believed him. Several more settlers came, convinci...