Slavic Federation

Background
Since the 20th century, Russia has seen it's self as the leader and protector of the Slavic people. It's failed in that task before but not this time. With Russian rebuilding after the fall of the USSR, aggression renewed in the 21st century, first regaining lost territory then most of Eastern Europe and the much of the Slavic population in the Balkans.

Russia Rebuilt
Following the collapse of the Soviet Union right before the turn of the 21st Century, Russia would spend the next couple decades the building the broken economy the Soviet Union left. Russian aggression renewed in a small way during the Ukrainian Crisis of 2013-14. Following the departure of US troops from the Middle East and Europe, as well as the collapse of the EU, Russia saw a opportunity and swiftly mobilized it's troops for an invasion. In a move reminiscent to the German Blitz, Russia quickly overwhelmed the ill equipped Eastern Europe within Months.