22s

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Across
  1. 5. - Spanish fleet defeated in 1588 (6 letters, six)
  2. 6. - Last active ruler of the Ptolemaic Kingdom (9 letters, nine)
  3. 7. - Warship of the Civil War era (8 letters, eight)
  4. 10. - Queen during England's Golden Age (9 letters, nine)
  5. 14. - Eastern Roman Empire (9 letters, nine)
  6. 15. - Ancient inhabitants of France (5 letters, five)
Down
  1. 1. - Trade route connecting East and West (8 letters, eight)
  2. 2. - Infamous sunken ship of 1912 (7 letters, seven)
  3. 3. - Medieval European social system (9 letters, nine)
  4. 4. - Location of a famous treaty (10 letters, ten)
  5. 8. - Mesopotamian temple tower (8 letters, eight)
  6. 9. - Napoleon's final battle (8 letters, eight)
  7. 11. - Carthaginian general (8 letters, eight)
  8. 12. - American Founding Father (9 letters, nine)
  9. 13. - Allied invasion of Normandy (4 letters, four)