12h

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Across
  1. 5. - Persian king who invaded Greece in 480 BC (6 letters, six)
  2. 6. - Last battle of the American Revolutionary War, effectively ending the conflict (8 letters, eight)
  3. 8. - Spanish fleet defeated by the English in 1588 (6 letters, six)
  4. 9. - German statesman who unified most of the German states into a powerful empire (8 letters, eight)
  5. 11. - Scottish knight who became one of the main leaders during the Wars of Scottish Independence (7 letters, seven)
  6. 12. - Persian prophet who founded Zoroastrianism (9 letters, nine)
  7. 15. - Intellectual and philosophical movement that dominated the world of ideas in Europe during the 18th century (12 letters, twelve)
Down
  1. 1. - System of government first established in ancient Athens (9 letters, nine)
  2. 2. - In Norse mythology, a hall located in Asgard where heroes slain in battle are received (8 letters, eight)
  3. 3. - Stone that was a key in deciphering Egyptian hieroglyphs (7 letters, seven)
  4. 4. - Hero of the Trojan War and the central character of Homer's Odyssey (7 letters, seven)
  5. 7. - Medieval Knights known for their role in the Crusades (8 letters, eight)
  6. 10. - British Prime Minister during much of World War II (9 letters, nine)
  7. 13. - First artificial Earth satellite, launched by the Soviet Union (7 letters, seven)
  8. 14. - Last imperial dynasty of China (4 letters, four)