There were millions of things invented before WW 2- but some notable ones included airplanes, submarines, radios, tanks, machine guns and automobiles.
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New inventions changed warfare during World War 1 by creating new weapons and creating more casualties. Some of the inventions during World War 1 were tanks, infantry rifles, and machine guns.
There were some Machine Guns invented, and also airplanes..im sure there are MANY more!! im doing research on it right now!
Ok so there was a lot of inventions in world war 2 like TV invented to send secret messages to the soldiers without other people relizing it or noticing it!!!!!! Yes, Morse code was the best invention so soldiers and their family could write to each other!
Semiconductor laser later used in CD players
Some of the new inventions that made a significant impact in World War 1 include the machine gun, which revolutionized warfare by allowing for rapid and continuous fire. Another important invention was the tank, which introduced armored vehicles and changed the dynamics of ground warfare. Additionally, chemical weapons, such as poison gas, were developed and used for the first time during this war, causing widespread devastation.