The famous American military leader credited with leading the Allies to victory in Europe during World War II is General Dwight D. Eisenhower. As the Supreme Commander of the Allied Expeditionary Forces, Eisenhower played a key role in strategizing the D-Day invasion and subsequent military operations against Nazi Germany. His leadership qualities and diplomatic skills were crucial in uniting various Allied forces. After the war, he became the 34th President of the United States, where he continued to influence global affairs, further solidifying his legacy as a pivotal figure in American history.