Tanks, gas and early airplanes were mayor developments in ww1. The First World War lasted for four years and three months. It involved sixty sovereign states, overthrew four Empires, gave birth to seven new nations, took ten million combatant lives along with another 30 million wounded.
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it developed more quicker withou the war.
The use of machine guns during the First World War is one of the primary factors that led to the war's high death roll. They also contributed to the development of trench warfare which was used extensively in the war.
He was the lead scientist in the development of the atomic bomb program.
The United States during World War 2. The development is known as the Manhattan Project