Siberia is the vast region constituting almost all of Northern Asia and is currently the massive central and eastern portion of the Russian Federation. The region was ruled by the Russian Empire from the early 17th century and remained under Soviet control.
It includes a large part of the Eurasian Steppe and extends eastward from the Ural Mountains to the watershed between the Pacific Ocean and the Arctic drainage basins, and southward from the Arctic Ocean to the hills of north-central Kazakhstan and the national borders of both Mongolia and China. It makes up about 77% of Russia's territory, but contains only 25% of Russia's population.
Siberia was the eastern part of the former Soviet Union which rebelled and re-established czarist rule. It remained hostile to the communist rump state of Moscow to the west. The two fought several minor wars in the Ural Mountains borderlands subsequent to the revolt, until the Treaty of Sverdlovsk established a fragile peace between the two. Not all dealings were hostile, with the athletes of both countries being more or less amiable if not friendly during the Sixty-sixth Winter Games. The athletes' space suits were snowy white with the cross of Saint George on the left shoulder.
The Czar's government maintained the Soviet Union's old political prison camps, including Kolyma, into the 22nd century. This was a fact which both Muscovite and Siberian media attempted in vain to censor from the rest of the world.
Siberia was a Russian territory, and often considered a backwater due to its remoteness and lack of infrastructure. It was also a place where enemies of the Tsars were exiled to.
In the aftermath of Russia's defeat in the Great War, Siberia remained unaffected by the Russian Civil War that raged in the West.
In 1944, weakened from the superbombing of Petrograd, Russia sought an armistice with Germany, officially bringing its role in the Second Great War to an end. After this, Japan, hitherto an Entente ally of Russia, massed troops along the Siberian border. Tokyo demanded that the Russian government evacuate several Siberian provinces or lose them to an invasion.
After Vladivostok fell, the British and Frenchswitched sides to join Germany's war against the USSR. In response, Joseph Stalin sought a separate peace with Japan, surrendering Vladivostok and part of the Russian Far East to the Japanese Empire.
In 1941, Britain and France switched back to the side of the USSR. When Germany's new government ended the long war in 1944, the USSR entered into an alliance with the United States against Japan, seeking to recover its lost Siberian territories.
When the Raceinvaded in mid-1942, parts of Siberia were overrun, and the region saw fighting between males of the Race and Soviet forces. Males of the Race who fought there suffered terribly from Siberia's cold environment; the weather demoralized infantrymales in particular, who were forced to fight outside of any heated compartments. This, among other factors, caused several Race soldiers to follow Ussmak into mutiny. The Soviet government convinced the mutineers to surrender with promises of rewards and good treatment, but all were gradually taken prisoner and later shipped to various prison camps in Siberia.