Im not that far off with the Russians using old gear.

yes, that's a German gun but hey it's of the same vintage
As of October 14, 2024,  Russian forces have been noted using a type of howitzer which they sold to client states in the 1950s but are now using in Ukraine. 

Osprey T-34 which i listed either on this blog or Grampies War noted that those tanks were still being used in the 1990s, which i also have pictorial evidence in other publications. 

So, I defined will be tossing in some Soviet older gear in my games!