To elaborate further and with thanks to Mr. Switch.
In my last game as Allies (2 players) I built 3 INF and 3 ARM on the Soviet first turn. The look on my opponets face, “Oh I win already the idiot is buying tanks for Russia” made me think the plan had a chance.
I attacked Belorussia with the 3 INF in Karelia and both Fighters.
I attacked West russia with all other units that could reach except for leaving one INF in Archangel.
The Belo battle went badly missing on all dice and taking two hits. So I retreated my INF back to Karelia and FTRs to Moscow. Opponent getting full of himself, my stupid attack not paying fruit, tanks and attacking Belorussia?
West Russia was taken in one round with loss of one INF.
I reinforce West Russia with the remaining Archangel INF, I didn’t need it to move into Karelia, moved two INF from that territory between Caucauses and China into Caucauses, move all of the Pacific coast INF into Buryatia for six INF on Manchuria’s border, moved 2 INF into China and the other two back to Moscow.
Built Tanks in Moscow and build INF in Caucauses.
I see his eyes light up, “He has left Caucauses wide open, I can soooo kill 5 INF with what I can get in there.”
Which he did leaving three Armor out on a limb to be swatted by “The West Russia Stack” next turn with assist from the Moscow tanks. He burnt all his ARM and front line INF first turn and couldn’t mount a real march on Moscow till the US and UK were rolling. Not only were US and UK reinforcing but Russia’s own defense was solid. Now he likely will not make that mistake again but it should illustrate the sort of thing you are trying to do with Russia. It works both directions. I had two more turns to buy 2 ARM before I felt a need to start buying all INF.
It is a long way to Moscow. Make it take a lot of time. That is what you are trying to do with Russia.