Roman crossword puzzle!

1234567
Across
  1. 3. battle for the end of the gallic wars
  2. 5. used as weapon for offence
  3. 7. continent where we are right now
Down
  1. 1. wars between romans and Gauls
  2. 2. ruler of the Gauls
  3. 4. used to defend against the enemy
  4. 6. roman emperor