Soviet Republic

The Federation of Soviet Solar Republics, abbreviated FSSR and shortened to the Soviet Republics, was a Communist interstellar federation which existed in the Milky Way galaxy from its foundation in 2335 to its defeat and abolition in 2671. Soviet-held or -aligned worlds resided mostly in the middle-belt region of the Orion, Centaurus, Crux, and Carina arms at the spinward-trailing region of the Milky Way galaxy, a densely-populated and densely-colonized region of the galaxy.
The Soviet Republic was founded by a coalition of human, tauran, graal, and other colonists holding collectivist or communist viewpoints, by a treaty of union that dissolved the Interstellar Socialist Republic, the graal-led Worlds Commonality, and the tauran-led Covenant of Carina, and amalgamated their territories into a federation of autonomous worlds.
For the duration of its existence, the FSSR was the pioneering and flagship communist state in the Milky Way, blending working class revolutionary ideals and models of governance from various species and civilizations, and serving as the main backer of radical egalitarian political groups in other states throughout the galaxy.
Despite its foundations under radical democracy, the leading figure in its foundation, human activist and Marxist theorist Connor Mackenzie, sidelined opposition under single-party rule. While reforms allowed multi-tendency democracy and liberalized local autonomy in the years after his assassination in 2349, a coup d'etat by Mackenzist hardliners in 2401 resumed military rule. This again changed in 2438, when a reformist faction led by chief minister Petronia retook control of the Supreme Soviet; the party was reformed as a federation of local, multi-tendency parties, and each Soviet Solar Republic would be granted leeway to develop socialism in their own way. The FSSR began a period of "peaceful coexistence" with the Terran Empire and its allies, though it involved itself in international peacekeeping operations in the Spinward quadrant. After a century of this, however, increased tensions between the Soviet bloc, ISTO, and Free International Group led to a three-way cold war from the 2560s onward. Anti-human sentiment increased in the 2580s, and the military and central party bureaucracy realigned to repress and deport human citizens. In the following decades, they moved against market-socialist SSRs in the border regions, condemning them as reactionary and capitalist. The radicalized political climate dismantled some of the autonomy of the member republics, and reinstituted centralized planning to gear the nation up for war with the capitalist and Terran blocs.