When World War 2 ended, the Red Army was comprised of 12,839,800 men and women. Of these 1,046,000 were in the hospital being treated, 403,200 were transferring to civilian administration, leaving 11,390,600 active service men in the field.
The Red army had roughly 600 divisions in the field, of which 500 were rifle divisions and approximately 50 were tank corps. Over the next 3 years following WW2, the Red Army strength was reduced to around 3 million troops, mostly the veteran guards troops.
The vast majority of the Red Army went home after WW2, and in the following 2 decades, the Red Army would be renamed Soviet Armed Forces, and would be reorganized drastically around mechanized units, almost completely abandoning foot and truck mobile infantry.
Credit/Cite: Carl Hamilton (Quora)