Croatian pilots flew a variety of planes on the Eastern front as a unit within the Luftwaffe. If I am correct, this crew is celebrating its 1000th flight.

Celebration: Croatian Warplane Crew

Panzer I of the Tercio (note the emblem) - so probably of the Legion Condor - passing trough CTV troops. DVX

Pz I of the Tercio

Croatia's military presence on the Eastern front was represented mainly by the so-called Croatian Legion, shown in action above. The Legion was integrated into larger Axis armies, eventually fighting in the Lower-Volga region.