High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! The S.S. Eastland was a passenger ship based in Chicago and used for tours. On 24 July 1915 the ship rolled over while tied to a dock in the Chicago River. A total of 844 passengers and crew were killed in what was to become the largest loss of life disaster from a single shipwreck on the Great Lakes. Following the disaster, the Eastland was salvaged and sold to the United States Navy. After restorations and modifications the Eastland was designated as a gunboat and renamed the USS Wilmette. She was used primarily as a training vessel on the Great Lakes and was scrapped following World War II.