I almost always stack Kar and here is why.
- 2 UK figs that I land there are UK units killing Germans as early as G2.
- AA guns can really wreak G’s air and cause CDF during an attack on Kar by G.
- It is where I start my UK shuck on UK2, even if G takes it in force, UK will usually wipe out any survivors
- It kills German units.
If you let G reach critical mass in IPCs OR unit count you are doomed. But if you kill German units your friends (US/UK) have a much easier time cracking that nut open. I have had many games where on R1 I stack Kar, on G2 it is taken leaving a few German tanks left, Russia begins to push back in the south and begins stacking up Persia/Chingai and the UK lands in Kar killing the remaining armor. This means G will usually only have token inf/art on Russias doorstep with 9 inf/1art in Poland and whatever they built in Berlin. A very good looking board for the allies.
Let me give you an example, if Germany were to bring 10 inf, 1 art, and 6 arm up against 11 inf, 1 art, 1 arm, 2 figs, they would have roughly 5 units left on average. That is the most ground G can have in range for G2. For each plane that comes along you can assume 1 more ground unit left, but that gets messy because of AA gun. If the UK builds boats in SZ 2 (the best) the US can land up to 2 fighters on UK’s carrier. The UK should have 2-4 transports loaded up ready to drop into Kar on UK2 killing all german survivors. This is a worst case assumption, G should not have that many units in range.
Russia absolutely needs to be offensive but must be careful because of Italian can opener threat. This leaves you few options. You can either build planes and set up trades and deadzones, you can mass up units to push G’s back in Belo or Ukraine, or you get germans to die by attacking you. I perfer the last 2 options and that is why my favorite R1 purchase is 2 inf, 6 arts. I stack Kar. If G ignores Kar I move all those units into Belo and purchase tanks R2, being sure to move as many inf as needed into Ukraine to block the can opener and move my AA guns in Kar and Cauc to cover Belo and Ukraine (let them SBR me there I don’t care). This gives you a force of around 18 inf, 8 art, and 6-7 armor that can hit East Poland on R3. Along with G loosing Finland/Norway to the US/UK, an US fleet in SZ 12, and the SBR campain begining in force, this makes for a bad German turn 3. Sure they can attack you, or continue stacking, but then soon you and the UK will rally in Baltic or East Poland and begin driving the fascist back. Its almost like revised except the US goes after Italy/Africa instead and stays down there till they can take Italy or France.