The tank is an extremely powerful fighting machine, invented by people to go through fire and water. In World War I were used first tanks moved thanks of steam, but they moved to a small relative speed on smooth spaces. Other disadvantages are that the tanks inside their room was very hot and not more than three persons. But a few years later, in the Second World War tanks had diesel engines were large, they were equipped with machine guns, steel tracks and had a higher speed. The biggest advantage was that tanks were moving on rough terrain. But it was not the only advantage of these machines of war, were able to destroy tanks in a short time, tens of barbed wire fences or buildings. Therefore, with their British and French armies had won great victories in the First World War, as in the Second, were the German victories. So the tank has developed over the years that today, thanks to modern technology can be run by a board computer and performance is downright amazing.