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Panzers only this week - with the Sdkfz 253 armoured artillery observation vehicle.
We see it here with a couple of Sturmgeschütz III, Ausf B's (or A's...) and a motorcycle dispatch rider. Probably a typical combination for the Stug III's early war role as mobile artillery support for the infantry.
The open flat landscape could suggest the photo was taken in Russia, but judging from the headlights on the 253 and Stug lacking the low-visibility covers usually required at the front lines, we could also be looking at a unit training in Germany.