Navajo Code Talkers

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Across
  1. 2. Code used by the US Marines in WW2 was based on this native language
  2. 5. Navajo code talkers were sworn to _______
  3. 6. Island battle the code breakers helped win
Down
  1. 1. Unbeatable, impossible to crack
  2. 3. Navajo code was used in WW2, Korea, and ________
  3. 4. Most code breakers were used in this theatre (area) of the war