When the D-30 122mm howitzer:
began entering service in 1963, it was intended that its predecessor, the M-30:
would be retired as quickly as D-30 production allowed. The M-30 was a barely modernized version of the M1938, which had entered service in 1939 and ceased production in 1955. There were two versions; the most common, without a muzzle brake:
Industrial production in the Warsaw Pact being what it was, it proved impossible to fully phase out the M-30 and it continued to serve alongside the newer D-30 right up until the fall of the Soviet Union, though the Soviets retained fewer of them in service than did the other members of the WarPac. In fact, quite a few former Communist countries still have M30s in their reserves.
I chose Star 266 trucks as prime movers:
I ran across this oddity when searching for images of the Star 266:
I still have one more battery in mind. Some outdated guns for my East German reserve and training unit, the 20th Motor Rifle Division. More on that in the next post or two.