Comparing: D1 vs. T1E6

Development was started in 1929. Mass production was launched in 1930, with 160 vehicles manufactured by 1935. A total of 152 tanks fought in France. Eighteen vehicles were captured by the German Army and used for training purposes.

Experimental vehicles T1E4 through T1E6 were heavily influenced by the British Vickers E. The first prototype was manufactured by the Cunningham corporation in 1931. After trials in 1932, an upgraded variant was built. However, a different experimental tank, the T2, was preferred.