The Huey became a symbol of U.S. combat forces in Vietnam and millions of people worldwide watched it fly in TV news reports. At its peak in March 1970, the U.S. military operated more than 3,900 helicopters in the war in Vietnam and two thirds of them were Hueys. Their impact was profound, not only in the new tactics and strategies of airmobile operations, but on the survival rate of battlefield casualties. U.S. Army patients made up 390,000 of the total number of people transported by medevac helicopters in Southeast Asia. Almost a third of this total (120,000) were combat casualties. The Huey airlifted ninety percent of these casualties directly to medical facilities.