M-55S

After achieving independence in 1991, Slovenia took ownership of the M-84 and T-55 tanks that Yugoslavian forces had operated inside the country but left behind upon conclusion of the Ten Day War. The Slovenian Army began a project to upgrade the T-55 units, fitting them with British L7 105mm rifled guns and bricks of Blazer explosive reactive armor (ERA) attached to the turret and hull. The newly christened M 55S main battle tank was accepted into service in 1999. The tank gained attention decades later, in 2022, when Slovenia donated several units to Ukraine’s military.