I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "The RSFSR was established on November 7, 1917 (October Revolution) as a sovereign state. The first Constitution was adopted in 1918. In 1922 the Russian SFSR signed the Treaty on the Creation of the USSR."? 

What happened to the RSFSR after the October Revolution?