Eastern European crisis is a mod telling a story about the future of Europe. In 30's of XXI century, NATO power weakens, European economy deteriotates and ethnic tensions inside such countries as France, Britain and Germany rises. In this situation, Poland and Ukraine become once again one of the biggest economies, because of these countries stability and large deposits of shale gas, which boost their economic abilities.
This is the heavy AA defense of Ukraine and the biggest danger for Polish planes entering the Ukraine airspace.
They are even rumored to destroy several Russian Tu-22M bombers in Georgia!