The Sherman

An M4 (105) Sherman tank with spare track-links welded on its front for additional armor protection, preserved at the Langenberg Liberation Memorial in Ede, Netherlands

A light tank used by the U.S. Military during WWII. Its significance lies in its ability to be mass produced as compared to tanks such as the Tigers used by Nazi Germany. So even though better performing tanks existed having dozens of Sherman's sent at one time led to success.