Billy Mitchell - Wikipedia

On July 21, 1921, to prove his contention that air power is superior to sea power, US Colonel William Mitchell demonstrated how bombs from planes could sink a captured German battleship.

William Lendrum Mitchell (December 29, 1879 – February 19, 1936) was a United States Army general who is regarded as the father of the United States Air Force.[1][2]

Mitchell served in France during World War I and, by the conflict's end, commanded all American air combat units in that country. After the war, he was appointed deputy director of the Air Service and began advocating increased investment in air power, believing that this would prove vital in future wars. He argued particularly for the ability of bombers to sink battleships and organized a series of bombing runs against stationary ships designed to test the idea.

"He antagonized many administrative leaders of the Army with his arguments and criticism and, in 1925, was returned from appointment as a brigadier general to his permanent rank of colonel due to his insubordination. Later that year, he was court-martialed for insubordination after accusing Army and Navy leaders of an "almost treasonable administration of the national defense"[3] for investing in battleships instead of aircraft carriers. He resigned from the service shortly afterward.

Mitchell received many honors following his death, including a commission by President Franklin D. Roosevelt as a major general. He is also the only individual for whom an American military aircraft design, the North American B-25 Mitchell, is named."