HOOAH!!!
Hooah /ˈhuːɑː/ is a battle cry used by soldiers in the U.S. Army and airmen in the U.S. Air Force.[1] Originally spelled "Hough", the battle cry was first used by members of the 2nd Cavalry Regiment during the Second Seminole War in 1841, after Seminole chief Coacoochee toasted officers of the regiment with a loud "Hough!", apparently a corruption of "How d'ye do!"
https://en.wikipedia.org/wiki/Hooah