Image from a Soviet stamp Issued in 1968 in honour of the 50th anniversary of the Red Army. It shows Lenin addressing and rallying the Red Vsevobuch troops in Red Square, May 25, 1919. These troops fought to ensure the victory of the Revolution over the counter-revolutionary forces both foreign and domestic.
To learn more about the Revolutionary Civil War see: Hostile Whirlwinds: The Civil War and the Russian Revolution (theleftchapter.com)
This historic image is available as three kinds of mug at out Etsy store:
Ceramic mug 11 oz: https://daughtersoftheempire.etsy.com/listing/1683525191
Ceramic mug with accent colours: https://daughtersoftheempire.etsy.com/listing/1669356200
Ceramic mug 15 oz: https://daughtersoftheempire.etsy.com/listing/1669361120