Which Country am I?

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Across
  1. 1. I was once a battleground for this war
  2. 6. One of the World Heritage sites in the north of my country
  3. 9. The French gave me this type of bread
  4. 11. My national costume
  5. 12. For some reason my people like putting one of these in their coffee
  6. 14. My cuisine often uses this sauce
  7. 15. My country's most famous leader
  8. 16. My language uses this alphabet (with a few embellishments)
  9. 17. My country's type of language where the pitch changes the meaning
  10. 18. I'm a top global exporter of this food product
  11. 19. This colour is in my flag
  12. 20. I look a bit like this letter
Down
  1. 2. My currency's name is the same as the sound made by a large bell
  2. 3. I'm one of the world's largest producers of this product
  3. 4. This famous rice noodle soup comes from my country
  4. 5. My country is swamped with this type of transport
  5. 7. My largest city was once known by this name
  6. 8. This happened in my country in the same year a large computing company was founded in America
  7. 10. My country's name for the answer to 9 across
  8. 13. Winnie the Pooh rules this country nearby
  9. 16. A popular river town is famous for these lights