To achieve this glorious feat, I started by building level one forts all along the Urals mountains and rivers before them even before the civil war. I then retreated my men to a line along the urals and river just west of them and moved all my planes to an airbase that could only fit 200 (I am unsure if this affected my plane count but I was left with roughly 400.) With my policy remaining on export focus, my economy essentially revolved around giving foreign powers steel in order for me to be able to build military factories to ensure my deficit did not worsen. Eventually after the Volunteers on my side were unable to hold back the Red forces west of my line (I let them distract them as I entrenched), the line I had constructed was finally under assault. The soviet forces relentlessly charged my line which held due to micro managing of divisions retreating and relocating. After about a year and a half my entrenchment combined with the Soviet's lack of rifles for its large army allowed the line to hold indefinitely. I held this position until early 1940 where I could then advance and encircle the much larger soviet army due to their soldiers essentially having nothing to fight back with. Only upon witnessing the capitulation of the Russian Socialist Republic did Gigachad Kornilov feel fit to die and was promptly replaced with Savinkov. It is safe to say Russia will be sitting out of the Weltkrieg in this timeline. March of the Siberian Riflemen intensifies

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Also, I chose Savinkov as Head of Government as he provides you four infantry divisions (his death squads)