Complex sentence: These men and women never questioned where they would go to fight or why or whom, just how much they would be paid-until the King of Thrace hired them to train his men to become the greatest army of all time.
Split into simpler sentences: These men and women never questioned where they would go to fight or why or whom, just how much they would be paid. Until the King of Thrace hired the mercenaries to train his men to become the greatest army of all time.