History of the Peloponnesian War

And from this time Perdiccas began to regard Brasidas as an enemy, and thenceforth he cherished a hatred of the Peloponnesians, which was indeed not consistent with his feeling against the Athenians. However, disregarding his own urgent interests, he was devising how he might in the quickest way come to terms with the latter and get rid of the former.

Returning from Macedonia to Torone, Brasidas found the Athenians already in possession of Mende; and thinking it now impossible to cross over to Pallene and give aid, he remained quiet where he was, but kept watch over Torone.