M-55S - The Upgraded T-55 Sent to Ukraine

Having been in service since 1947 with over 50 state and non-state actors, the T-54/55 is the most widely produced and used tank in the world. Naturally

T-54/T-55 operators and variants - Wikipedia

T-55 - Wikipedia

Tank Historia: The Ultimate Online Resource for Tanks and Armor

T-54/T-55 operators and variants - Wikipedia

Answering The Call: Heavy Weaponry Supplied To Ukraine - Oryx

Slovenia M-55S: Join the war in Ukraine

Russia's T-14 Armata - A super tank or lost investment?

T-55 – Wikipedia

Ukraine to Get M-55S Tanks From Slovenia