Who was the highest ranking US general to die during battle in world war 2?

The highest ranking U.S. general to die during battle in World War II was General John McAuliffe. He was a division commander during the Battle of the Bulge and is best known for his defiant response of "Nuts!" to a German surrender ultimatum. However, it is important to note that General McAuliffe did not die in battle; rather, Major General William H. Simpson, who commanded the 9th Army, was the highest-ranking general who died in combat during the war.