Why wasn't Mongolia integrated into the USSR as an SSR, despite being conquered while the USSR formed? | AskHistorians Archive Observer

Why wasn't Mongolia integrated into the USSR as an SSR, despite being conquered while the USSR formed?

by Bindle_

ouat_throw

/u/kaisermatlas kind of answered a similar question

https://www.reddit.com/r/AskHistorians/comments/6rqr72/communist_mongolia_requested_its_incorporation/