I found my great uncle on a Russian site that show the documents of Soviet WW2 soldiers. The docs say he (as an officer) led a group of sabateurs behind enemy lines and gives a list of the things they blew up in the space of a few months: 6 locomotives, a railway bridge, a highway bridge, several train cars full of troops, more full of policmen, cars full of munitions, a train hauling artillery pieces, etc. Some of my family members think this sounds pretty far-fetched for a single band of sabateurs. I've argued that the overwhelming amount of other records I've seen are "realitics." The site is podvignaroda.ru