template: ### Instruction: Rewrite this English sentence to give a better translation.
  
  ### English: Then the king said to the captain, “It is not necessary to give you a salary, but you will be called upon to serve in the army, and you will be obliged to go on military exercises once or twice a year, for a period of about two weeks each time.”
  ### English rewrite: In that time, the Defense Force is eligible to demand you take part in some military exercises once or twice a year for approx 2 weeks per year.