Who conducted the first American operational bombing mission during World War II?

The first American operational bombing mission during World War II was conducted by General Doolittle and his team, famously known for the Doolittle Raid. This mission involved a surprise air raid on Tokyo and other locations on the Japanese mainland, which took place on April 18, 1942. It marked a significant moment in the war as it boosted American morale following the attack on Pearl Harbor.

The mention of General Spaatz and the Mighty Eighth is important within the context of the U.S. Army Air Forces during the war; however, they were not responsible for the first bombing mission. They played key roles in strategic bombing campaigns later in the war. General Arnold was a prominent figure in the development of air power and strategy but did not lead the first operational bombing mission himself, and General Claire Chennault was known for his work with the Flying Tigers and was integral in other operations in China, not specifically linked to the first American bombing mission against Japan.

Thus, the distinction of leading the very first operational bombing mission during World War II goes to General Doolittle, highlighting the critical early strategies employed against enemy targets.