The AGM-12 Bullpup is a short-range air-to-ground missile developed by Martin Marietta for the US Navy. It is among the earliest precision guided air-to-ground weapons and the first to be mass produced. It first saw operational use in 1959 on the A-4 Skyhawk, but soon found use on the A-6 Intruder, F-100 Super Sabre, F-105 Thunderchief, F-4 Phantom II, F-8 Crusader, and P-3 Orion in both Navy and US Air Force service, as well as NATO allies. The weapon was guided manually via a small joystick in the aircraft cockpit, which presented a number of problems and its ultimate accuracy was on the order of 10 metres (33 ft), greater than desired. In the 1960s it was increasingly supplanted by fully automatic weapons like the AGM-62 Walleye and AGM-65 Maverick.

An air-to-surface missile (ASM) or air-to-ground missile (AGM) is a missile designed to be launched from military aircraft at targets on land or sea. There are also unpowered guided glide bombs not considered missiles. The two most common propulsion systems for air-to-surface missiles are rocket motors, usually with shorter range, and slower, longer-range jet engines. Some Soviet-designed air-to-surface missiles are powered by ramjets, giving them both long range and high speed.