How Britain Invented The Tank In WW1
The concept of a vehicle to provide troops with both mobile protection and firepower was not a new one. But in the First World War, the increasing availability of the internal combustion engine, armour plate and the continuous track, as well as the problem of trench warfare, combined to facilitate the production of the tank.
History of the tank - Wikipedia
Tanks in World War I - Wikiwand
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The Dawn of American Armor: The U.S. Army Tank Corps in World War I - The Army Historical Foundation
The First World War brought the end of cavalry and the advent of the tank