Who was Heinz Guiderian?

Answer 1

Heinz Guiderian was a German general during WWII. He was widely considered one of the foremost (if the not THE foremost) authorities on tank warfare at the outset of the war. He was largely, but by no means wholly responsible for the development of "blitzgrieg" tactics involving repeated flanking manuevers of massed armored units. He was twice relieved of command by Hitler, owing to his bluntness in expressing frustration at Hitler's tactical errors. The first when he predicted the failure to take Moscow by Christmas 1941 meant Germany had lost the war, and later following the battle of the bulge when Hitler relieved him as chief of the General Staff owing to "health issues." Following the war the US secreted him into the states to debrief on tank warfare tactics.