https://www.youtube.com/watch?v=aqTHzWOM1GI

During First World War, the Mark 4 was one of the most powerful British tanks.!! 

Mark IV Tank

The major improvements were in armor !The repositioning of the fuel tank, and transportability !There were 1220 Mark 4s built in total, with 420 "Males" and 595 "Females."

The Mark 4 was produced by six different companies, with Metropolitan being the majority builder

The main manufacturing began in 1917.

On the 7th of June 1917, during the British attack on Messines Ridge, it was first utilized in substantial numbers. Many of the 60 ,or so Mark 4s lagged behind the infantry ,as they rolled out in this war-torn terrain, but a few made important contributions .

WORK in PROGRESS ANIMATION Click the link