Supply problems to assumed control forces + unholy alliance
I was playing Japan, had taken command of the Swedish army, invaded England from the top, got to Newcastle, it still showed that they were in supply, but the organisation wasn't going up and I was getting oil problems (which I boilded down to sweden running out), but the organisation not going up was baffling. Germany had the same problem, they came in through the south, and just to have a look I assumed command of them too, and they weren't getting supplied. Can't be supply ships getting destroyed because there was virtually no enemy fleet, and if that was the case then we would have been losing troops to no supply, yet that wasn't happening. Had similar problems with the US in Italy, I was playing spain, assumed control and the same thing happened. Also, with the divying up of Germany on the Western Front, I found that there was no supply in the newly created US sectors, but the British sectors were in supply. I had to retreat the US forces, let the remaining German units take those areas, then I retook them and there was the supply.
Now the unholy alliance, playing Russia and was able to get the unholy alliance going with Germany, they finished off France, but then that was it, 1 year later and they hadn't done a thing, no invasion of Yugoslavia, nothing. Basically it appeared that the German AI was just going to ride out the war in Europe and not do anything else. I assumed with the unholy alliance they would have gone all out, but instead, they stagnated. They shifted practically all their planes in on the old Poland side, had half a dozen troops along the Yugolsavia side, plus a few planes, the rest of the troops were defending the beaches. Found the whole exercise pretty boring and gave up when it hit 1944.
The other problem I found was Persia, I declared war, they joined the allies, then when I took Tehran, they did the 'join the allied cause', gave me military access and that was it, I couldn't declare war on them even though I was at war against their allies.
My only other beef is with the AI, when it annexes an area, say the US annexing southern Italy, why doesn't the AI create new units in that area??? Island hopping with planes from the states is a tad tedious.