The Battle of Thermopylae: Spartans v. Persians

And so the Spartans and those other Greeks who fought to the death had lost the battle for Thermopylae. The Persian army could now march into central Greece, wreaking havoc and destruction. But, although the Greeks had lost this battle, the great courage shown by the Spartans boosted the morale of other Greeks. They were not ready just yet to surrender to the Persians.


How do we know this?