1001 Space Earth Nature History Human World Science and Technology Chemistry Materials Force and Energy Heat and Light Electricity and Magnetism Industry Machines Electronics and Computers Cars and Trucks Railways Ships Aircraft Fishing and Agriculture Undersea Exploration	When did aircraft first go into battle? Fighter planes were first used in the First World War (1914-1918). Initially, they were used to spy on the enemy, but later, guns were fitted and bombs carried. A World War I triplane   Previous: Back Book: 1001 Section: Science and Technology Chapter: Aircraft