The Battle of Potidaea took place in 432 BC. in thrace Potidaea was a Corinthian colony located on the western tip of Chalcidice and formed an alliance with the Delicatessen dominated by Athens. After the Battle of Sybota, a war broke out between Athens and Corinth (Corinth). Athens demanded that Potidaea break down its city wall on the south side, further sending hostages to Athens and Corinthian magistrates operating in Potidaea from their city. Athens was afraid of rebellion and that other cities in Thrace would follow.
King Perdiccas II of Macedonia was an ally of Corinth, he promised to send reinforcements and protect the people of Potidaea. Athens gathered a fleet of 30 trials and 1,000 hoplites under the command of Archestratus, to maintain order and to insist on a revolt in Potidaea. Potidaea, however, wanted to negotiate and send emissaries to Athens to calm down, and also asked for assistance to Sparta and Corinth. Negotiations did not turn out and the Athenian fleet was commissioned to sail to Potidaea. Sparta reported that in case Potidaea would be attacked by Athens, repressive measures were taken.
Potidaea rebelled against the Athenians, supported by Corinth. Meanwhile, other cities organized their own alliance, the Chalcidice Bond. The Athenian army began with the siege of Potidaea, Corinth sent a fleet of 1,600 hoplites and 400 light troops under the command of Aristeus. Shortly thereafter, Athens sent another fleet of 40 trials and 2,000 hoplites with cavalry under the command of Callias. After the Athenians had defeated the Macedonian army, they broke up to Potidaea and joined Archestratus.
During the two-year siege of Potidaea, the Athenian army knew 430 BC. to conquer the city. Aristeus managed to escape with his army along the coast, Corinth and Potidaea lost 300 men. Athens lost 150 men and General Callias. The Athenian Admiral Phormio fortified Potidaea with 1,600 hoplites and began a seablock at Chalcidice. Sparta declared the war to Athens.
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