The first Tank was made by the British on February 2,1916 and was called the Mark I Tank.The French started producing tanks on April 1917 and produced more tanks than all of the other army's combined.The French had the largest brigade of tanks during WW1. The first tanks were mechanically unreliable because they would overheat and steam and the terrain was nearly impossible for them to pass considering the Mortar shells that would destroy the area.Germany had made a lot of tanks in WW1 but they had only deployed 20 they had also captured 4 British tanks and used them against the allies.
The Tank was not a weapon in the war,it was a vehicle the tank just had weapons on it.Tank's could carry troops or they could be fighting Tank's that would battle other Tank's.