The bolsheviks were communist revolutionaries who successfully overtook the russian empire

True

The Bolshevik was a communist regime that was able to defeat the white armies, or the Melsheviks(?) (Sorry can't spell it), who only were able to fight together because they didn't want communism.

The white army was co.mprised of people who still wanted the noble family, those who wanted democracy, and people who just don't like communism, while the boshelviks were communists who wished to place the whole country under their ideology

Hope this helps

Both countries had to aprove annexation.