The AH-64 Apache Helicopter is the most effective attack helicopters in the world. They entered the fleet of the U.S. Army rotary wing aircraft in 1984, seeing combat for the first time in 1989. It’s considered to be the most advanced combat assault helicopter in the world. The McDonnell Douglas developed twin-engine attack Apache helicopter has been exported to Egypt, Greece, Israel, the Netherlands, Japan, Saudi Arabia, United Arab Emirates (UAE) and the UK; making the AH-64D Apache one of the most sought-after rotary wing aircraft ever created. It’s estimated that more than 1,800 units of the technologically advanced attack have been dispatched domestically and globally.