A guided bomb (also known as a smart bomb, guided bomb unit, or GBU) is a precision-guided munition designed to achieve a smaller circular error probable (CEP).
The creation of precision-guided munitions resulted in the retroactive renaming of older bombs as unguided bombs or "dumb bombs".
Space warfare is combat in which one or more belligerents are in outer space. The scope of space warfare includes ground-to-space warfare, such as attacking satellites from the Earth; space-to-space warfare, such as satellites attacking satellites; and space-to-ground warfare, such as satellites attacking Earth-based targets. The 1967 Outer Space Treaty forms the basis of space law; it prohibits permanent basing of weapons of mass destruction including nuclear weapons in space and the military use of celestial bodies, but does not prohibit the military use of Earth orbit or military space forces. Independent space forces are operated by the United States (US Space Force) and China (People's Liberation Army Aerospace Force). Russia operates significant space assets under the Russian Space Forces.
The Cold War prompted the start of the militarization of space. Military satellites have been launched since the late 1950s, for communications, navigation, reconnaissance and munitions guidance. The Gulf War is sometimes called the "first space war" for the US' use of these capabilities. The use of Starlink satellites by Ukraine has played a major role in the Russian-Ukrainian War.
An airstrike, air strike, or air raid is an offensive operation against ground or sea surface targets carried out by aircraft, such as military balloons, airships, attack aircraft, bombers, gunships, attack helicopters and attack drones. The official definition of an airstrike includes all sorts of targets, including low-altitude air targets, but in popular usage the term is usually narrowed to a tactical (small-scale) strafing, missile strike or tactical bombing on a specific army, militia or naval position, as opposed to a larger, more generalized and indiscriminate attack against an entire area such as carpet bombing and strategic bombing.
Weapons used in an airstrike can range from aircraft-mounted direct-fire cannons and machine guns, rockets and air-to-surface missiles, to various types of aerial bombs (both unguided and guided), glide bombs, air-launched cruise missiles, and even directed-energy weapons such as laser weapons.
Missile guidance is a field of engineering, specifically guidance, navigation and control, dealing with the control of missiles and guided bombs. Missile guidance systems are designed to maximize the reliability and accuracy of these weapons, by improving the likelihood they reach their target.
Guidance systems can be broadly divided into two categories: Go-onto-target (GOT) systems can be used against moving targets, and go-onto-location-in-space (GOLIS) systems attack fixed geographical positions.
A laser-guided bomb (LGB) is a guided bomb that uses semi-active laser guidance to strike a designated target with greater accuracy than an unguided bomb. First developed by the United States during the Vietnam War, laser-guided bombs quickly proved their value in precision strikes of difficult point targets. These weapons use on-board electronics to track targets that are designated by laser, typically in the infrared spectrum, and adjust their glide path to accurately strike the target. Since the weapon is tracking a light signature, not the object itself, the target must be illuminated from a separate source, either by ground forces, by a pod on the attacking aircraft, or by a separate support aircraft.
Data from the 28,000 laser guided bombs dropped in Vietnam showed that laser-guided bombs achieved direct hits nearly 50% of the time, despite the laser having to be aimed out the side window of the back seat of another aircraft in flight. Unguided bombs had an accuracy rate of just 5.5% per mission, which usually included large numbers of the munitions. Because of this dramatically higher precision, laser-guided munitions can carry less explosive and cause less collateral damage than unguided munitions. Today, laser-guided bombs are one of the most common and widespread guided bombs, used by many of the world's air forces.