What happened to the Athens after the war?

Answer 1

Thermopylai was not a war, it was a small delaying action in the 50-year Persian War.

Athens had already abandoned the city and sent its women, children, oldies and slaves to refuge in cities in the Peloponnesian peninsula.

The able males manned its fleet which combined with the fleets of the other cities to fight on at sea.

The Persians burnt and looted the city and demolished its walls in retribution for the defeat inflicted on them at Marathon ten years earlierat. The Persians withdrew north for the winter, then reoccupied the city the following spring.

When the Persians were defeated by the coalition of Greek city-states at Plataia, the Athenians reoccupird their city and built new walls, this time extending them down to include its port, so that the city could be supplied by sea in future seiges.