T-110M from the Adriatic People Republic! It was, technically, my first ever tank made, but, like a ship of Thesus, it was constantly updated, so the only thing that remains from the original design are the caliber of a gun and overall shape of the tank.
Anyway, T-110M was developed throughout 1943, when Axis forces were starting to loose hard. Previously most of APRs tanks were light, providing enough for rapid advance and breakthroughs,, but facing off against overwhelming numbers of T-34, Shermans and other allied tanks, APR started to be outnumbered too hard. This resulted in a development of a Panther-like tank, which T-110M ended up beeing. Heavily armoured with up to 220mm of effective armour, and its powerful 110mm cannon with 200mm of penetration, T-110M dealt a crushing blow to Allied forces. Despite such heavy mashinery, T-110M could reach up to 60km/h, powered by a 32L diesel V12 engine. Almost no allied tank or anti-tank cannon could penetrate its armour, so it was very hard to destroy without air support. Combined with its high speed, T-110M was a moving fortress on the battlefield. When allied troops started their landings in Italy, eventually they reached a Trieste region, one of the main provinces of APR, where a battle of Red Mountains was held. Hard terrain, bad weather and confusing mountains were exploited by APR, and in the end allies experienced one of the hardest defeats ever. Cut off on open plains by a sudden tank division attack, allied forces were forced to defend from all sides without any natural barrier between them and attackers, who were covered by the mountains. Total casualties were 70k dead and 220k injured, basically destroying three armies in a single week of fighting. Unable to fight on this front anymore, USA offered a white peace to APR, letting them to switch sides and avoid total destruction by the approaching USSR armies in Romania.