Oorah vs. Hooah — What's the Difference?

Oorah is a battle cry common in the United States Marine Corps since the mid-20th century. It is comparable to Hooah in the United States Army, the United States Air Force, and the United States Space Force.

Hooah is a battle cry used by Soldiers in the U.S. Army, Airmen in the U.S. Air Force, and Guardians in the U.S. Space Force. 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!" Since WWII, the word has been widely used throughout the US Army and gained a more general meaning of "anything and everything except 'no'".

The official yell for the US Marines.

The official yell of the US Army.