The Spartan army stood at the center of the Spartan state, citizens trained in the disciplines and honor of a warrior society. Subjected to military drills since early manhood, the Spartans became one of the most feared and formidable military forces in the Greek world, attaining legendary status in their wars against Persia. At the height of Sparta's power – between the 6th and 4th centuries BC – other Greeks commonly accepted that one Spartan was worth several men of any other state.