Question

Why was colonel billy mitchell court thrown out of the us army

Answer 1

He was court-martialed on the charges of insubordination and insisted that the Navy should build aircraft carries rather than battleships. He believed that these new vessels would be vital when war would occur. In a way he was proven in World War II when aircraft carries were instrumental in many victories at sea. 

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Answer 2

Here is some info I found:

On October 28, 1925, a young legal aid reported to a ramshackle warehouse in Washington, D.C. He placed a stack of legal volumes on a scarred wooden table, then waited for the court-martial of Army Air Service Colonel Billy Mitchell to begin. 

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