The "3 day war" idea was not an official millitary or government statement, Lukashenko and an RT editor both said it and the west has been using it as a way to obscure the fact that Russia has been steadily achieving its actually stated goals. I know you've read Lenin, have you read Imperialism, the Current Highest Stage of Capitalism? The Russian Federation is governed by nationalists, not finance capital, and Russia doesn't have a stake in the global financial monopoly. It's the west that has that. Russia doesn't really meet the Marxist understanding of imperialism, nor is it acting how we would expect imperialist powers to act.