In "The Battle for Stalingrad," Russia's Vasily Chuikov wrote that to the extent possible, Russian guerrillas and snipers tried to avoid "duels" with enemy fighting men, instead seeking out "soft" targets like the following:
Favorite targets included men carrying food and water to others (and therefore no arms). Killing or wounding one of them meant depriving other German soldiers of this nourishment. In one instance, Russian patrols captured a telephone "lineman" who was able to hook them up to staff headquarters, allowing the Russians to eavesdrop.
What kind of class were these troops? Were they regular soldiers on "special" duty, or were they specialized logistical troops that were spared from "normal" fighting. If a German division had say, 12,000 men, would these kinds of men be counted among a division's 12,000 strength, or would they be accounted for separately?