During the blockade , representatives from Corinth , Athens and Sparta met in Sparta , resulting in a formal declaration of war .
Both sides built walls and counter-walls , and the Athenians succeeded in cutting off Potidaea from the sea with a naval blockade .
During the blockade , representatives from Corinth , Athenians and Sparta met in Sparta , resulting in a formal declaration of war .
Both sides built walls and counter-walls , and the Athenians succeeded in cutting off Potidaea from the sea with a naval blockade .