Once during Darkest Hour I was invading the Russian Empire (now the USSR) as the Germany Empire and so I took the decision to take the Baltic and shit and release the Finnish as independent. So it worked out fine at first. But a day later all of Finland disappeared besides one little province in the very North and every unit I had in Russia just vanished. They weren't being redeployed either. Then another day later, the USSR got ALL the territory I had just taken from them besides the Crimea.
You mean controls Medvedev because of the implications of his presidencies does to cool down the hostilities between the two main factions in the Kremlin. Which putin uses to his advantage.