I believe that the Army is restricted to Propeller fixed wing combat aircraft. Only the other services can have dem new-fangled 'Blow hot air' types. Don't know if it is by law or by agreement, but if you want to fly combat by "blowin'it out your a$$", you ain't gonna be wearing Army Green!
When the Army and Air Force separated after WWII it was agreed the Army would give up fixed wing aircraft. But that could be changed if the Air Force doesn’t want its orphan.