What they don’t know they will learn.
Do they need nuclear submarines for a war in Ukraine?
Or air craft carriers?
Russia knows it can’t beat the world. That is why, push come to shove, it keeps the Samson option on standby.
I’m sure they can replace artillery gun barrels just fine.
What Russia does have are Freeper War Criminal aiders and abettors that have unwittingly become Hamas terror supporters.