An airstrike or air strike is an offensive operation carried out by attack aircraft. Air strikes are commonly delivered from aircraft such as fighters, bombers, ground attack aircraft, and attack helicopters. The official definition includes all sorts of targets, including enemy air targets, but in popular use the term is usually narrowed to a tactical (small-scale) attack on a ground or naval objective. Weapons used in an airstrike can range from machine gun bullets and missiles to various types of bombs. It is also commonly referred to as an air raid.