Leopard
Wiki
Leopard is a challenging tank to gun, its optic needs to be adjusted manual zeroed for each shot (see .gif at the bottom of the page). It's the only tank of its kind for that. This tank is best at being static, as engaging targets while moving can be overwhelming to hit accurate shots. Lastly, its ammo rack size/position is one of the worst of all tanks. Skilled gunners will easily hit your ammo rack, meaning getting the first shot in fights is essential to winning the fight, as you can't rely on people missing your ammo rack.
Created in 1970s for the United States Army, it is classified as main battle tank. Seeing use in several conflicts and countries over the last few decades.
