During 1920, Red Army personnel numbered 402,000 at the Western front and 355,000 for the South-West front in Galicia. Grigoriy Krivosheev gives similar numbers, with 382,000 personnel for the Western Front and 283,000 personnel for the Southwestern Front. Norman Davies shows the growth of Red Army forces on the Polish front in early 1920:

What were all the fronts by the Red Army in 1920?
Western front