The Athenian fleet sailed for Potidaea .
When Potidaea arrived , Archestratus attacked the Macedonians instead , as the Potidaeans had already revolted and allied with Perdiccas .
The Athenian fleet sailed for Potidaea , but when it arrived , Archestratus attacked the Macedonians instead , as the Potidaeans had already revolted and allied with Perdiccas .