The machine gun changed warfare
Chat with our AI personalities
The use of chemical weapons during the first World War ; see relevant link below .
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.
Although airplanes changed from cloth covered wooden airplanes of WWI into metal airplanes of WWII, as well as more advanced and powerful bombers; the real change was "Naval Warfare." Air power completely eliminated the mighty battleship as a decisive naval weapon. Airplanes (launched from aircraft carriers) became the new naval weapon. WWII may be unique in that it was the only war in history in which aircraft carriers fought aircraft carriers.
trench warfare
Airpower made killing a mechanical act rather than a personal act.