Joint scientists of sappers and tankers in the highlands, during which the soldiers are faced with the task: to pave a road in the mountains through the pass and establish a crossing on the river. The commanders are checking the route on the map. The tanks are coming up to their starting positions. Sappers carry out blasting operations. Bulldozers are clearing debris. Mechanics repairing a tank in a workshop. Camping kitchen of a military unit; the soldiers are having lunch. Types of roads in the mountains. Road construction in the evening. The sapper unit directs a pontoon crossing over the river in the evening. View of the pontoon bridge. Tanks are moving along a mountain road. The traffic controller shows the way to decoys. Tanks are crossing the bridge. View of the mountain pass and the bridge from the plane.