In this article, we look at 15 countries with the most attack helicopters in the world. According to European Security and Defence (ESD), there are about 3,000 attacks helicopters currently in operation in over 70 countries. The first notable deployment of the aircraft by the United States was in 1967 with the introduction of the Bell AH-1 Cobra in Vietnam. This deal with Textron Inc. (NYSE:TXT) is set to be the largest helicopter procurement by the Army in four decades.