World War I was the first "world war," however, it was not the first war ever fought.
^ While the above answer is correct I think that what your teacher is looking for is the French and Indian War which was fought in America it is technically the first world war since it was fought in North America, Europe and Asia
North America - French and Indian War
Europe - the Seven Year War
Asia - Third Carnatic War
World War 1 introduced aerial warfare with airplanes and trench warfare
It was during WW1 that airplanes and tanks were introduce in warfare.
It was during WW1 that airplanes and tanks were introduce in warfare.
During World War Two, the first mechanized warfare was used in fighting. This was in the form of tanks and airplanes.
Before World War 1, airplanes were used for recreation. However, during World War 1 airplanes were used for reconnaissance and spying on the enemies. Airplanes were also used as fighter jets and as bombers. Airplanes changed warfare greatly and allowed for blitz attacks and air warfare.
Airplanes and parachutes
Combined arms type of battle.
Airplanes
Machine guns, tanks, airplanes, chemical warfare
Opened a new dimension in warfare: the sky.
During the First World War
battlefront trenches airplanes and tanks. battlefront trenches airplanes and tanks.