The IS 3 is one of the best heavy tanks the world saw. Its a soviet heavy tank with a decent 300 mm sloped armour on the upper armour plate and 230 mm sloped lower plate. Without the angle of the armor its thinkness is 110mm. The IS 3 has a soup bowl shaped inpenetrable turret and a 122 mm gun with more than 230 mm of penetration with its powerfull 122mm APHE shells. It had a crew of 4. The earliest prototype was created in 1944 but it didnt saw action in World war 2, but it was shown in the Berlin victory parade. The tank was used i a couple of conflicts like the Soviet invasion of Hungary, Prauge spring, Sino-soviet split and others. It was feared from the west and in response were build assault guns like the american M109G and the british Fb4005 .
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