The man who knew too much

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Across
  1. 3. - art of using the infantry soldiers handgun
  2. 4. - sea
  3. 6. - name given to a person in addition to real name
  4. 9. - the rank of a soldier
Down
  1. 1. - increase
  2. 2. - army officer
  3. 5. - lean and thin
  4. 7. - obtain
  5. 8. - speed