Some of the new technologies that were invented or significantly advanced during World War I include:
1. Tanks: The British developed the first tanks during World War I to break through enemy lines and provide cover for infantry.
2. Machine guns: Although machine guns had been around before the war, they were significantly improved and became more widely used during World War I.
3. Aircraft: The use of airplanes for reconnaissance and combat missions became widespread during the war, leading to advancements in aviation technology.
4. Poison gas: Chemical weapons, such as mustard gas and chlorine gas, were used extensively during World War I, leading to the development of gas masks and other protective gear.
5. Submarines: Submarines played a significant role in naval warfare during World War I, leading to advancements in submarine technology.
6. Trench warfare: The concept of trench warfare, with soldiers digging trenches for protection and cover, became prevalent during World War I.
7. Radio and telecommunications: The use of radios for communication on the battlefield greatly improved coordination between units and headquarters during World War I.
8. Flame throwers: Flamethrowers were used for the first time during World War I, providing soldiers with a new and terrifying weapon.
Overall, World War I marked a period of significant technological advancement in military technology, leading to the development of new weapons and tactics that would shape warfare for decades to come.