Huh, history would suggest otherwise.Becase the Soviets wasn't interesting to attack other countries, and wasn't aggressive.
The whole thing about "aaggressive and expansionist CCCP/China" is a myth.
All that the Soviets wanted is to live peacefully, without the danger to die do to bombings of your main cities.
What do your think, what is the reasons of the extreme deep metro lines everywhere in the ex CCCP?
The Soviet Union had its reasons to act like it did according to its own justifiable geopolitical needs back then but peaceful and non-agressive it was certainly not.