Where did the Marine phrase who rah come from?

The phrase "Oorah" originated in the United States Marine Corps and is used as a motivational call or expression of enthusiasm. Its exact origins are debated, but it is believed to have been influenced by various military chants and sounds used in training. Some suggest it may have roots in the World War II era, while others point to the 1950s and the influence of other branches of the military. Today, "Oorah" symbolizes camaraderie and readiness among Marines.