page_title: Billy Mitchell
section_title: Rules of engagement
hierarchical_section_title: Billy Mitchell / Project B: Anti-ship bombing demonstration / Rules of engagement
caption_attribution_description: English: SMS Frankfurt sinking.
context_page_description: William Lendrum Mitchell was a United States Army general who is regarded as the father of the United States Air Force.
  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" 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.
context_section_description: The Navy and the Air Service were at cross purposes regarding the tests. Supported by General Pershing, the Navy set rules and conditions that enhanced the survivability of the targets, stating that the purpose of the tests was to determine how much damage ships could withstand. The ships had to be sunk in at least 100 fathoms of water (so as not to become navigational hazards), and the Navy chose an area 50 mi (80 km) off the mouth of the Chesapeake Bay rather than either of two possible closer areas, minimizing the effective time the Army's bombers would have in the target area. The planes were forbidden from using aerial torpedoes, would be permitted only two hits on the battleship using their heaviest bombs, and would have to stop between hits so that a damage assessment party could go aboard. Smaller ships could not be struck by bombs larger than 600 pounds, and also were subject to the same interruptions in attacks.
  Mitchell held to the Navy's restrictions for the tests of June 21, July 13 and 18, and successfully sank the ex-German destroyer G-102 and the ex-German light cruiser Frankfurt in concert with Navy aircraft. On each of these demonstrations the ships were first attacked by SE-5 fighters strafing and bombing the decks of the ships with 25-pound anti-personnel bombs to simulate suppression of antiaircraft fire, followed by attacks from Martin NBS-1 (Martin MB-2) twin-engine bombers using high explosive demolition bombs. Mitchell observed the attacks from the controls of his DH-4 aircraft, nicknamed The Osprey.
caption: Frankfurt sunk
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