Russian Revolution

The Russian Revolution was an uprising in Russia during World War I in 1917. The Tsar was assassinated, his line was wiped out. A civil war followed between Red (Communist) and White forces, and in the end, despite extensive support for the Whites from a number of Western nations, the Communists defeated all their rivals, consolidated power, and formed the Soviet Union in 1922.

''Note:The Russian Revolution took place as above in most Harry Turtledove timelines as described above. It is only immediately germane to a handful of them.''

Russian Revolution in Worldwar
In 1942, when Soviet Foreign Commisar Vyacheslav Molotov met with Atvar, fleetlord of the Race's Conquest Fleet, aboard the 127th Emperor Hetto, he horrified the Race by explaining the Russian Revolution to Atvar. Atvar had assumed the Soviet Union was an empire, the only form of government known to the Race or any other species it had encountered to that point, and he was shocked and appalled to learn of Tosevite not-empires.

Russian Revolution in Southern Victory
The Russian Revolution was a rebellion against Tsar Nicholas II of Russia which began in 1917, during the Great War. An alliance of various anti-Tsarist forces, led primarily by socialists and supported by the Central Powers, killed Nicholas II and forced Russia to withdraw from the Great War. A decade of civil war followed, in which the Tsarists under Mikhail II emerged victorious.

Russian Revolution in "Uncle Alf"
Russia experienced a revolution in 1916, after its defeat at the hands of Germany in the brief war that took place inn 1914. Germany, fearing the consequences within its own borders if the Russian tsar fell, helped put the revolution down very quickly.