Which general distinguished himself as a leader in World War II, Korea, and Vietnam?

The correct answer is General Daniel "Chappie" James Jr. He is notably recognized for his distinguished service and leadership during significant conflicts including World War II, Korea, and Vietnam. General James was the first African American four-star general in the United States Armed Forces and played a vital role in various operations, showcasing his strategic acumen and leadership qualities throughout these pivotal moments in history.

General James' contributions were not only in combat but also involved adapting strategies and mentoring junior officers, ultimately influencing the U.S. Air Force's direction during those turbulent times. His legacy emphasizes not only the military tactics but also the importance of diversity and leadership in the armed forces.

The other individuals mentioned have made significant contributions to military history, but their careers don't encompass all three of these conflicts with the same level of distinction as General James. For instance, General Douglas MacArthur was primarily known for his involvement in World War II and Korea, while General Dwight D. Eisenhower is chiefly recognized for his role in World War II and later presidential duties. General James Mattis, although a notable figure, did not serve during World War II, as he entered service later.