Billy Mitchell demonstrated the potential of airpower in 1918 and was drummed out of the service for his effort. It wasn't until 1940 that someone got the message...
Just like general Billy Mitchell was Court martial for disobeying an order and bombing a captured German ship And demonstrating that the future soldier was a paratrooper, it's ironic that our future enemies paid attention. This battle what's the preamble for pearl harbor a year later.