Panzerkampfwagen III of Heeresgruppe Süd (Army Group South) advances through the Kuban Steppe on the Caucasus Mountains during Operation Blue (Unternehmen Blau/Fall Blau). The Panzer III is from the 6. Kompanie, 3. Zug and is tank number 3, going by its turret number ‘633’; there’re a couple of symbols on the right rear mudgard- the one on the right might be that of the 1. Panzer-Division. Original caption from Signal magazine: “tank 633 spots a Russian anti-tank emplacement and at once opens fire”.