# data[].attributes.body
Tanks of the interwar period evolved into the much larger and more powerful designs of World War II. Important concepts of armoured warfare were developed; the Soviet Union launched the first mass tank/air attack at Khalkhin Gol (Nomonhan) in August 1939, and later developed the T-34, one of the predecessors of the main battle tank. Less than two weeks later, Gemany began their large-scale armoured campaigns that would become known as blitzkrieg ("lightning war") – massed concentrations of tanks supported by motorised and mechanized infantry, artillery and air power designed to break through the enemy front and collapse enemy resistance.

# data[].attributes.body
A tank is an armored fighting vehicle designed for front-line combat, with heavy firepower, strong armour, and tracks providing good battlefield manoeuvrability. The first tanks were designed to overcome the deadlock of trench warfare; now they are a mainstay of modern ground forces and a key part of combined arms combat.

# data[].attributes.body
The machine was designed while Leonardo da Vinci was under the patronage of Ludovico Sforza in 1487. Sometimes described as a prototype of modern tanks, da Vinci's armored vehicle represented a conical cover inspired by a turtle’s shell. The covering was to be made of wood and reinforced with metal plates that add to thickness. Slanting angles would deflect enemy fire. The machine was powered by two large inside cranks operated by four strong men. The vehicle was equipped with an array of light cannons, placed around the perimeter.

The gears of the design were located in a reversed order, making the vehicle unworkable. This is thought by some sources to have been a deliberate mistake by Da Vinci as a form of security, in case his design was stolen and used irresponsibly.

The vehicle was designed to intimidate the enemy rather than to be used as a serious military weapon. Due to the vehicle's impressive size it would not be capable of moving on rugged terrain. The project could hardly be applied and realized in the 15th century.

Around 2010, a group of engineers recreated Leonardo’s vehicle, based on the original design. The mistake in gearing was fixed.

# data[].attributes.body
Leonardo da Vinci's fighting vehicle is one of the conceptualizations of the revered Italian polymath and artist Leonardo da Vinci.