What the tanks did in the warCompared to other weaponry, the tank was the most rapidly developed weapon system in the history of warfare. From a non-existent beginning, the tank went from concept to the decisive edge in WWI less than three years. The tank was originally designed as a special weapon to solve an unusual tactical situation, the stalemate of the trenches. Basically, the tank was intended to bring the firepower of artillery and machine guns across the morass of No Man's Land while providing more protection than a purely infantry unit could carry
The main thing tanks did in the war was push through the enemays lines, but this was uasually unscuccsful due to poor fire power and voneroblitiy to enemays shells