Tanks Reigned Supreme on WWII Battlefields > U.S. Department of

Between World Wars I and II, improvements were made to the tank engine to give it greater speed and power; track and suspension systems and weaponry upgrades came as well. 

U.S. Army: Foreign Tanks Are Now Competitive to the M1 Abrams

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The Most Heavily-Armed American Tanks of WWII - 24/7 Wall St.

Deadly bombs still being found on World War One battlefields after

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WW2 British Prototypes Archives - Tank Encyclopedia

U.S. Army Service, Campaign Medals and Foreign Awards Information

Future of Ukraine War lies in broad politics of power rather than

United States of America (WW2) - Tank Encyclopedia