Erusian Soviet Federative Socialist Republic: "Bastion of People's Friendship!" The Erusian Soviet Federative Socialist Republic (Erusian SFSR/ESFSR) was a large Socialist Republic located within Western-Central Eurasia, and a key administrative district and founding member-state within The Aykhal Pact. The Erusian SFSR formed under the Marxist Erusian Social Democratic Labor Party during the Erusian Revolutionary War against the former Erusian Empire.