What was a key achievement of General Henry H. Arnold during his tenure?

During his tenure, General Henry H. Arnold's key achievement was significantly increasing the air force's size and capabilities, notably expanding its personnel to over 2.5 million. This expansion was vital during World War II, as it allowed for a more effective air campaign and demonstrated the importance of air power in modern warfare. Arnold recognized the need for a robust air force to support combat operations and logistics, driving recruitment and training initiatives that contributed to this considerable growth.

While other technological advancements and military strategies are certainly important in the history of military aviation, Arnold's efforts to build a large and effective air force were foundational in establishing the United States Air Force as a key branch of the military. His vision helped shape the future of air power and laid the groundwork for air strategy in subsequent conflicts.