An airstrike, air strike, or air raid is an offensive operation carried out by aircraft. Air strikes are delivered from aircraft such as blimps, balloons, fighter aircraft, attack aircraft, bombers, attack helicopters, and drones. The official definition includes all sorts of targets, including enemy air targets, but in popular usage the term is usually narrowed to a tactical (small-scale) attack on a ground or naval objective as opposed to a larger, more general attack such as carpet bombing. Weapons used in an airstrike can range from direct-fire aircraft-mounted cannons and machine guns, rockets and air-to-surface missiles, to various types of aerial bombs, glide bombs, cruise missiles, ballistic missiles, and even directed-energy weapons such as laser weapons.
In close air support, air strikes are usually controlled by trained observers on the ground for coordination with ground troops and intelligence in a manner derived from artillery tactics.
The first large scale air raid occurred during World War I in 1915, when London was bombed by 15 German Zeppelin dirigibles at night. Since the residents of London, and many of its defenders, were asleep, a loud warning system for air raids made sense, leading to the creation of the air raid siren.
It was not until World War II that the Oxford English Dictionary first records usage of the term "air strike", which remained two separate words for some time thereafter. The Second World War also saw the first development of precision-guided munitions, which were fielded successfully by the Germans, and contributed to the modern sense of air "strike", a precision targeted attack as opposed to a strafing run or area bombing.
The importance of precision targeting cannot be overstated: by some statistics, over a hundred raids were necessary to destroy a point target in World War 2; by the Persian Gulf War, the U.S. Air Force was able to release to media precise footage of television- or radar-guided bombs directly hitting the target without significant collateral damage (using, for example, the LANTIRN pod).