What do the Athenians do before undertaking anything against Xerxes?

Before undertaking any actions against Xerxes, the Athenians sought to unify and strengthen their alliances with other Greek city-states, recognizing the need for a collective defense against the Persian threat. They also consulted the Oracle of Delphi for guidance, seeking divine support and advice on how to proceed. Additionally, they prepared their naval forces and fortified their city, ensuring they were ready for the impending conflict.