Comparing: D1 vs. Tetrarch vs. Vickers Mk. E Type B

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.

Developed in 1936 by the Vickers-Armstrong company, with a total of 177 vehicles in two basic modifications the Tetrarch Mk I and the Tetrarch Mk ICS manufactured from 1941 through 1942. In 1942 twenty vehicles were delivered to the U.S.S.R. under Lend-Lease, of which 19 fought on the Eastern Front until October 1943.

Developed in 1928 by J. V. Carden and V. Loyd. The vehicle never entered service in Great Britain. However, it was exported to other countries, including China. In 1937, twenty vehicles of this type fought against Japanese troops at Shanghai. Soviet Vickers-based T-26 vehicles were also exported to China, and 82 vehicles of that type were deployed in South China and Birma in 1941–1942.