History of the Peloponnesian War

He became such, because the Athenians had made an alliance with his brother Philip and Derdas, when acting together against him.

And being alarmed, he both sent to Lacedaemon, and tried to contrive that they might be involved in war with the Peloponnesians, and endeavoured to win over the Corinthians, with a view to Potidaea's revolting;