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
Slovenia M-55S: Join the war in Ukraine
Which Countries Supply Ukraine With Tanks? - 03.10.2023, Sputnik Africa
How useful have obsolete weapons like the T-62s and T-55/54 tanks been in Ukraine? What have they been used for, and to what degree are they good at it? Is it practical
T-54/T-55 - Wikipedia
Slovenia hands over M-55S tanks to Ukraine: what they are
T-55
M-55S: Slovenian Wrath - Ground - War Thunder — official forum
Rebels from storage: how old T-54/55 tanks are used in the special
Kuwait May Send M-84 Tanks to Battle Putin in Ukraine
Canned glory. Russian Army putting to use Stalin and Brezhnev era equipment
T-55 AGM (2012)
The M-55S tank: a deep modernization of the Soviet T-55 for the Armed Forces •
Russian Tanks Are 'TANKING' Due To Ukraine War; Report Reveals How US-Led Sanctions Stymie Production Of T-90M, T-14 Armata
M-55S tanks donated by Slovenia are now in service with the Ukrainian army, Defense News December 2022 Global Security army industry, Defense Security global news industry army year 2022