Briefing between an infantry unit and assault gun commanders before opening an attack operation, Eastern Front. Center: Battalion commander, Major Vielhauer (knights cross award) September 1943. 

Briefing between commanders

The expression of "perfect vertical" does not come close to the way these German soldiers hold their rifles with bayonets during a formation...

Near vertical perfection

The twin-machine gun; one of the few anti-aircraft weapons available for German ground forces.