Russia is a nation-state. It is the largest nation-state on Earth, stretching from Europe across Asia.
It used to be part of the Soviet Union, and the most dominant of its fifteen republics, but in the mainstream TFUniverse, the band broke up in the early 1990s.
History
Joe comic/TF cartoon
MUX
Shattered Glass
In the Shattered Glass universe, Russia is still part of the USSR. It was recently attacked by Decepticons from the mainstream TFUniverse.