usually when i do the russian pull back, i have all russia’s tanks in novabrisk. if germany puts a large force in kar, i take it out, if they dont, i take the tanks to japan.
the pull back allows you to keep nearly all your units, and forces the germans to really think about what they wanna do. by pulling back, it allows you to gain a position where you have 4 tanks and 2 planes that can reach nearly any potential targets of opertunity. like the time i did this and the japs had left just 2 troops to guard 3 planes and a factory in manchuria. hit em with 4 tanks 2 fighters, and 5 troops, eliminating them pesky fighters, and delaying them using the factory.
the real reason it worked long term was because i had a friendly britain sending me fighters for defence, while amerca was doing the flotilla thing. doesnt work quite so well when your allies are uncoordinated.
overall, not the most effective tactic, but fun and works under certain cuircumstances. i even won a turnament with it once. the german guy was normally pretty good, but he was “convinced” that i was a noob, and fell for it hook, line and sinker. psychology in a game can be fun :)