Operation Retribution (1983: Doomsday)

Operation Manchurian Freedom, known by some local Manchurians as the First Manchurian War, was an armed conflict led by the Union of Sovereign Socialist Republics, consisting of an invasion of the the former Chinese provinces of Manchuria, and a period of occupation and combatance against a dwindling insurgency. The operation began in 1990 with the Siberian invasion of Northern Manchuria, ending in the annexation of the region by the USSR.

Operation Manchurian Freedom is often divided into two main phases, with the first phase only lasting a few short months, known as the Invasion Phase. This phase included an invasion of Manchuria starting on April 1990 by a Siberian invasion force. It was followed by a longer but sporadic and minor second phase of fighting, known as the Post Invasion, or Insurgency Phase, in which an insurgency emerged to try to oppose the occupying forces and the newly formed Manchurian government. Resistance to Siberian rule would continue largely until 1995, when Siberian officials declared that the insurgency had officially been exhausted, lacking proper supplies and reinforcements to continue.

The war is considered the largest conflict to erupt in the region since Doomsday, followed by the Second Manchurian War which would occur twenty-two years later following the bombing of a passenger train heading from Primorskaya Territory in Siberia to Korea, killing 137 people.