Possible Clues:

• Peloponnesian War winner
• Leonidas's land
• Athens' rival of old
• Domain of King Tyndareus
• Was in Greece, thanks to the yard on board
• Territorials taking fight on in old city
• Rival of Athens during the Peloponnesian Wars
• Cheers on box? Or Enemy of Athens?
• Laconic state of a constituent in South Africa
• Soldiers joining fight in city of old