What was Billy Mitchell found guilty of in his court martial?

Billy Mitchell was found guilty of insubordination during his court martial. This situation arose after he publicly criticized military leaders for their lack of support for air power, especially following the destruction of naval vessels in a demonstration he had conducted to illustrate the effectiveness of air attacks. His outspoken nature and refusal to retract his statements were seen as direct challenges to the authority of his superiors, which led to the charge of insubordination. This conviction underscored the tensions between differing views on military strategy at that time, particularly the emerging role of air power in modern warfare.