As the wisest of you may heve noticed, r*ssia is quite fucking big. There are huge difficulties for it's invasion, not only the long distances to march, but also the huge area to cover, the muddy terrain and the hard weather. Terefore, instead of marching east like crazy, I think we should try to use the complex river waterways of r*ssia in our favor, surrounding Moscow from North and South, through the Don and the Volga rivers.
The first step would be two massive simultaneous strikes to Kaliningrad and Crimea. Then, our main forces would focus on taking St. Petersburg; while the central group invades Belarus, and the southern group liberates the southern Ukranian occupied territories. The central group would then liberate the rest of Ukraine, and the southern group would enter r*ssia through Rostov and march to the famous city of Volgograd. Once St. Petersburg has fallen, the northern forces would march east to reach the Volga, then follow the river's course. The canals and waterways would make the army supplies a lot easier than if they were through land. Finally, all our forces would converge into Moscow, taking the city and liberating r*ssia from it's oppressive regime.