Hello, in historical order, it is Russia, Soviet Russia, Soviet Union, Russia and CIS. 1. Russia, also known as Russian Empire or Tsarist Russia, 1547~ 19 17. 2. Soviet Russia, 19 17 The Russian regime fell, and the Bolshevik party headed by Lenin established the Soviet regime. 3. Soviet Union 1922~ 199 1. There are 15 countries in the Soviet Union, not only Russia, but also Russia, Belarus, Ukraine, Kazakhstan, Tajikistan, Turkmenistan, Uzbekistan, Kyrgyzstan, Georgia, Moldova, Armenia, Azerbaijan, Lithuania, Estonia and Latvia. 3. 199 165438 After the disintegration of the Soviet Union on February 25, it became the Russian Federation today. Russia inherited the rights of the Soviet Union in the United Nations. 4. CIS is not a country, but a regional organization. Former countries that joined the Soviet Union decided to replace the Soviet Union with this organization, including the Russian Federation, Belarus, Ukraine, Moldova, Armenia, Azerbaijan, Tajikistan and Kyrgyzstan. Georgia and Turkmenistan withdrew. Hope to adopt, if you don't understand, please continue to ask questions.