US troops in training build a pontoon bridge and also use boats and pontoon boards to cross a river at Front Knox in Kentucky.

US troops training at Fort Knox, Kentucky.Trucks and tanks cross a river at The troops run towards a shore, get on boats and cross the river. An army truck taken across the river on a pontoon boat. The troops push a tank while their shoes fill with mud. Tanks are brought across the river on flat boats. Troops lay pontoons over boats. The tanks cross the pontoon bridge.