The US and other countries form NATO to remove communist countries. They were not informed of the Siberian Civil War until the rebels won. This new Siberia recreated the USSR, and invaded New Moask ( Russia ,but a Captialistic one). Some of NATO the declares war on the USSR

Current Wars: Siberia Civil War, USSR invasion of New Moask

Siberia Civil War
Communist Siberia: won

Democratic Siberia: lost

USSR invasion of New Moask
NATO
New Moask, Australia, USA, Portugal, Canada

USSR

Note: this RP is not joinable ,but you can say what happens in the comments.