The leaders of 42nd ClearÂance Company cased the unitâs colors Tuesday during a brief ceremony in Fort Knoxâs Sadowski Center, signaling an end to their time on post. The eventual move, expected to be complete when the unit reforms by Oct. 1, is the latest change in the unitâs nearly 77-year history, which began as a petroleum distribution company. Company Commander Capt. Michael Churchill said their mission also will change. âIt will be a lot less route clearance-focused and more supporting a (brigade combat team) in a direct action conflict,â Churchill said. âIt will be more mobility as far as Sapper tasks go â lighter equipment.â