Propaganda in the surroundings. Once, somewhere in the forested region of Ukraine, we took a large group of Germans into the ring. The Germans did not want to surrender, were very well armed and so on. Then, on the perimeter of this surrounding, they carried a clutch wire and hanged indicators - "Camp for prisoners of war"... As a result, the Germans (how many there were, I don't remember, but from 20 thousand or more) surrendered.