The three best tanks on Earth, let the debate begin: Are tanks still useful in the 21st century? I can offer three tanks that deserve clear recognition as the three best tanks on Earth, although I will admit, there is room for debate. Here are all of the reasons why:3 best tanks on earth: Meet the M1 AbramsAn M1A2 Abrams fires a sabot round. 3 best tanks on earth: Meet the K2 Black PantherA South Korean K-2 tank in June 2012. 3 best tanks on earth: the German LeopardGerman army Leopard 2 tanks in Munster in October 2015.

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