Guiding a river crossing in warm weather will not surprise anyone. It takes only an hour. First, the assault squads capture the bridgehead on the other side of the river, then floating sections of the bridge are dumped into the river, and these sections are brought together directly on the water. The crossing is ready. Now they can go through it Tanks, artillery and even complexes with intercontinental missiles.
But what if the equipment needs to be transferred to the other side in the winter season? The task is complicated even by several times, but by an order of magnitude.