World War 2 led to many advancements for the warfare area, and research. With few examples being Weaponry, Communications, and Rocketry.
Weaponry advanced in more simple ways, like with small arms which included revolvers, pistols, and rifles, basically the idea was to make anti-aircraft and anti-tank guns portable, also jet aircraft came to be during World War 2, jet aircraft are propelled by jet engines, and have a fixed-wing. Also huge advancements for tanks, which made ground warfare way easier but was more of an undertaking to maintenance, but the tanks could be equipped with a mine flail to clear mine fields for the infantry, two major tanks that were used were the tank destroyer, and specialist tanks. Tank destroyers focused on engaging enemy armoured vehicles, and the specialist tanks consists of unusually modified tanks, that operated in different ways, examples being a tank with a flame-thrower, or the mine flail, even some were used for transportation in water.
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The sonar is a technique that uses sound propagation, detects objects under the surface of the water, also can be used for acoustic location and measurement of the echo characteristics of objects in the water, early development of computers and of such data related machines, such as punch-card machines, were applied for personnel record handling, and to depot and supply operations connected over wide areas by signal communication networks, also television played more of a part for training aid in military schools, where instructors were few, so it made up for the loss of teachers and