What conflict was the first significant air war that occurred from 1914 to 1918?

The first significant air war that occurred from 1914 to 1918 is World War I. This conflict marked the first extensive use of aircraft in warfare, showcasing their potential for reconnaissance, ground attack, and air-to-air combat. The introduction of biplanes and later more advanced aircraft changed the tactics and strategies employed by military forces, highlighting the importance of aerial superiority. The war fostered rapid advancements in aviation technology and tactics, laying the groundwork for air combat in subsequent conflicts. This period saw the emergence of famous fighter pilots and significant air battles, establishing the airplane as a crucial element of modern warfare. In contrast, the other options represent conflicts that occurred later, with World War II beginning in 1939, the Korean War occurring from 1950 to 1953, and the Vietnam War from the late 1950s until 1975.