
Extract the answer to the question from the following context.
Question: What happened to the RSFSR after the October Revolution?
Context: 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.

The RSFSR was established on November 7, 1917 (October Revolution) as a sovereign state
