 Soviet Union and Democratic Republic of Afghanistan Air Force jet fighters and bombers would occasionally cross into Pakistani airspace to target Afghan refugees camps in Pakistan.In order to counter the Soviet jets, United States started providing F-16 jets to Pakistan.These F-16 jets lacked the capability to fire radar-guided beyond-visual range missiles and thus required to get close to their opponents in order to use their AIM-9P and more advanced AIM-9L Sidewinder heat-seeking or their 20-millimeter Vulcan cannons.