Who is the Greek god of the sea?

Greek city-state

King of the Greek gods:

Greek marketplace:

Early civilization know for sea trading:

Alliance formed between Sparta and nearby cities:

Alliance formed between Athens and many seaside cities

Hilltop fortress of Greek cities:

Civilization of Greece known for its piracy:

Which leader helped Athens achieve its greatest democracy?

Place of physical training:

Rule by the few

Rule by the many

Athenians defeated Darius and the Persian army

Naval battle won by the Greeks which drove most of the Persians out of Greece: