Until nineteen ninety-one, fifteen republics made up the Soviet Union. In December nineteen twenty-two, Byelorussia, Transcaucasia, Russia and Ukraine were the four founding republics that signed a treaty creating the USSR. During the nineteen twenty-four national demarcation, Turkmenistan and Uzbekistan were formed from parts of Russia's Turkestan and two Soviet dependencies: Bukharan, and Khorezm. Five years later, Tajikistan was divided from Uzbekistan,...