One award singled out as an example of medal inflation is the Army Service Ribbon, awarded for completing basic initial training, introduced by the US Army in peacetime in 1981. The 1983 Invasion of Grenada has also been cited as an example: some 8,600 campaign medals were awarded despite only 7,200 troops actually serving in the country. The "New York Times" also notes the awarding of combat medals to seamen of the USS "Vincennes" who shot down a civilian airliner, Iran Air Flight 655, in 1988 and the issue of a Purple Heart wound medal to a paratrooper who suffered heat stroke during the 1989 United States invasion of Panama were controversial. The Gulf War of 1990–91 saw almost 3.5 million US service members awarded the National Defense Service Medal, though the majority remained in the United States during this time.