Tank, transliteration of English tank, refers to tracked armored combat vehicles equipped with weapons and rotating turrets. Tank has the characteristics of firepower, mechanical force and armor protection, and is a weapon combining spear and shield. During the First World War, due to the widespread use of rapid-fire weapons such as machine guns and trenches and bunkers on the battlefield, the defensive tactics of positions were improving day by day, and it was often difficult for the warring sides to break through each other's defense lines. Whoever tries to take the initiative to attack will suffer heavy losses. Faced with this situation, at that time, military strategists all over the world were eager to create a new weapon that could attack and defend. 19 16 September 15, the British and French allied forces launched a fierce battle with Germany in the somme river area of France. Suddenly, the British army dispatched eleven behemoths made of steel and thundered at the German position at a speed of six kilometers per hour, completely defeating the Germans. These steel monsters equipped with guns are the new weapons-tanks successfully developed by the "Committee for Creating Land Cruisers" secretly established by the British Secretary of the Navy in the Admiralty. France, Britain, Russia and the United States all claim to have invented the tank first. As France said, the inventor of the tank was a Frenchman, Captain Reva Shore; The United States says that the sofa club in the United States will be Defeng; Russians say, the son of the famous Russian chemist Jereyev, Huaxi Dmitrievich Mendeleev. In fact, the earliest tank recognized in the world should be the "Little Willy" tank (also known as "Mother" or "Mark 1") made in Britain in 19 16. Because the British Admiralty kept secret when testing and manufacturing tanks, the tank's body, chassis and turret were all made in different factories, so most people thought that this kind of vehicle was for supplying water to the front, so people named the tank "water tank", which was transliterated as "tank" in Chinese. The success of tank research has realized the long-cherished wish of military strategists all over the world and created a new type of container that can attack and defend. In fact, this weapon, which integrates attack, defense and movement, did not start with tanks. As early as the Spring and Autumn Period and the Warring States Period, there were chariots that could attack and defend. Later, Ma Long in the Western Jin Dynasty made a "sidecar" and craftsmen in the Song Dynasty made a "universal car". Although these chariots are powered by animal power and manpower, with wooden boards as defensive armor and bows, arrows, guns or artillery as offensive weapons, they cannot be compared with modern tanks. But these ancient weapons, which combine attack, protection and movement, undoubtedly inspired the inventors and manufacturers of tanks. Therefore, in a sense, the "sidecar", "all-around car" and a kind of motorized chariot that appeared in Russia in the16th century are the "ancestors" of modern tanks.