Billy Mitchell was a World War I air-power visionary who spent the 1920s trying to convince a skeptical military establishment that airplanes, not battleships, were the future of American defense. In September 1925, two disasters gave him an opening: the Navy dirigible Shenandoah crashed, and a Navy transpacific flight failed. Mitchell didn’t stay quiet about it.
The Statement That Started the Court-Martial
He publicly accused the War and Navy Departments of "incompetency, criminal negligence, and almost treasonable administration of the national defense." That is not measured language for a serving colonel to use about his own chain of command in public, and the Army did not take it as measured language. He was court-martialed for insubordination in a converted warehouse near the Capitol, with hearings running from October through December 1925.
He was convicted on all counts. History has mostly concluded he was right about the substance and wrong about the volume.
The Verdict
Mitchell was convicted on all counts. His sentence: suspension from rank and duty, at half pay, for five years. Rather than serve it out, he resigned from the Army in February 1926.
What Happened After
Mitchell spent the rest of his life advocating for the air power he’d been court-martialed for demanding, and died in 1936 — five years before Pearl Harbor demonstrated exactly the kind of air vulnerability he’d spent his career warning about. Congress posthumously promoted him to major general in 1946. The Army named a WWII bomber, the B-25 Mitchell, after him. The institution that convicted him for insubordination spent the following two decades quietly agreeing with almost everything he’d said — just not in time to matter to his actual career.