T20 Medium Tank*
*
Planned successor to the M-4 Sherman series*
of tanks, this was the first of several series of*
prototypes that the US Army ordered during*
World War II in a line of development which*
culiminated in the M-26 Pershing.*
* 
The first T20 pilot was completed in May 1943, but*
was deemed insufficiently advanced and with too*
many drawbacks, and the project was cancelled*
in December 1944.*