The story of the tank began in World War I, when armoured all-terrain fighting vehicles were first deployed as a response to the problems of trench warfare. In Britain, tanks were first referred to as landships. The Landships Committee was set up in 1915 by Winston Churchill to develop designs. To conceal their true purpose from possible spies, they were called tanks, to give the impression of simple water tanks. The name stuck.
The first offensive using tanks took place on 15 September 1916, during the Battle of the Somme. . The French and British armies built thousands of tanks, but the German army was unconvinced of their potential and built only 20.
The doctrine of armored warfare changed radically in the inter-war years as armies sought ways to avoid the deadlock imposed by modern firepower and looked for the means to restore offensive power on the battlefield. Initially, tanks had been used for close support of infantry, but as modern mechanized doctrine was developed by several armies, tanks became an essential part of the combined-arms team. In addition to infantry support, tanks fulfilled traditional cavalry roles, provided mobile artillery support, and were adapted to combat engineering roles.
Tank design gradually improved in the inter-war period also. Reflecting the growth of the automotive industry, tank engines, transmissions, and track systems were improved. By the beginning of the war in September 1939, tanks were available that could travel hundreds of miles on their tracks with a limited number of breakdowns.
The tanks deployed by Germany during WWII were inferior in terms of armaments and armor, but had one key advantage: they all carried radios, enabling better tactical coordination and flexible use as rapid attack forces. Nazi Germany was doomed to lose the war against the combined economical might of the Soviet Union and the United States, who both focused on mass-producing simpler constructions. Until the very end, Germans manufactured tanks which were more complicated to produce and service, and only in the last few of years of the war they began to seriously contemplate standardizing their tanks with the so-called E-series (Entwicklung) tanks.
The Allied strategy of using massive numbers of medium quality tanks proved effective against the German army. As Stalin used to say, “Quantity has a quality all its own”. After WWII ended, most tank factories returned to manufacturing their original products.