By 1920, the Bolshevik Government in Russia and Ankara Government had successfully came to power in their respective countries. The Turkish revolutionaries successfully occupied western half of Armenia, while the Red Army invaded and annexed the Republic of Armenia in December 1920. A friendship treaty was signed between Bolshevik Russia and Kemalist Turkey in 1921. The formerly Russian-controlled parts of Armenia were mostly annexed by the Soviet Union, in parts of which the Armenian Soviet Socialist Republic was established. Hundreds of thousands of genocide refugees found themselves in the Middle East, Greece, France and the US giving start to a new era of the Armenian diaspora. Soviet Armenia existed until 1991, when the Soviet Union disintegrated and the current (Third) Republic of Armenia was established.