Advanced Attack Helicopter
![](/Images/godic/202412/20/YAH-64_1982_01761_cr1044.jpg")
![Probable axes of attack of the Warsaw Pact through the Fulda Gap and the North German Plains (according to the U.S. Army)](/Images/godic/202412/20/Probable_Axes_of_Attack1044.jpg")
![A YAH-63A prototype](/Images/godic/202412/20/Yah630011044.jpg")
![An early Hughes YAH-64A prototype with T-tail](/Images/godic/202412/20/Hughes_experimental_copter1044.jpg")
The Advanced Attack Helicopter (AAH) was a United States Army program to develop an advanced ground attack helicopter beginning in 1972. The Advanced Attack Helicopter program followed cancellation of the Lockheed AH-56 Cheyenne. After evaluating industry proposals, the AAH competition was reduced to offerings from Bell and Hughes. Following a flight test evaluation of prototypes, Hughes' YAH-64 was selected in December 1976.