An 88 mm Flak is engaging ground targets at Mariupol, in the Ukraine, near Rostov-on-the-Don.
 


88 mm cannon in action

A 3.7 cm FlaK 18 battery; FlaK (FliegerabwehrKanone, "aircraft defense cannon", also cited as Flugabwehrkanone). 
   The 3.7 cm Flak 18 was an anti-aircraft cannon. It was fully automatic and effective against aircraft flying at altitudes up to 4,200 m.

Anti-aircraft battery

German soldiers with a coastal battery overlooking a portion of the Normandy beach, dotted with anti-personnel obstacles. France - Spring, 1944.