American World War I ace (1879-1936) regarded as the father of the US Air Force, whose zealous ambition and vocal criticism of the War and Navy departments following the war led to a court-martial and his resignation. Vintage fountain pen signature, "Wm. Mitchell," on an off-white 4.5 x 2.5 page affixed to a slightly larger mount. In very good condition, with show-through from seven pieces of tape used to permanently affix the signature.
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