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In 1921, Billy Mitchell's bombers proved air power by sinking what?

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  1. A German battleship, the Ostfriesland
  2. An American aircraft carrier
  3. A U.S. Navy destroyer

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References

  1. CAP Teacher's Guide for Aerospace: The Journey of Flight (lesson outlines) www.gocivilairpatrol.com/media/cms/2nd_edition_Teachers_Guide_5D3166D76F9B1.pdf Checked 2026-10-10.
  2. CAP Billy Mitchell Award page www.gocivilairpatrol.com/programs/cadets/stripes-to-diamonds/mitchell Checked 2026-10-10.

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