Ukrainian Soviet Socialist Republic
Eventually, after the creation of the Communist Party (Bolshevik) of Ukraine in Moscow, a third Ukrainian Soviet government was formed on 21 December 1919 that initiated new hostilities against Ukrainian nationalists as they lost their military support from the defeated Central Powers. Eventually, the Red Army ended up controlling much of the Ukrainian territory after the Polish-Soviet Peace of Riga. On 30 December 1922, along with the Russian, Byelorussian, and Transcaucasian republics, the Ukrainian SSR was one of the founding members of the Union of Soviet Socialist Republics (USSR).
Post-Soviet states
The Eurasian Economic Union is an economic union of post-Soviet states. The treaty aiming for the establishment of the EAEU was signed on 29 May 2014 by the leaders of Belarus, Kazakhstan and Russia, and came into force on 1 January 2015. Treaties aiming for Armenia's and Kyrgyzstan's accession to the Eurasian Economic Union were signed on 9 October 2014 and 23 December respectively. Armenia's accession treaty came into force on 2 January 2015. Although Kyrgyzstan's accession treaty will not come into force until May 2015, provided it has been ratified, it will participate in the EAEU from the day of its establishment as an acceding state. Moldova and Tajikistan are prospective members.