One side being the Athenian Empire against the Peloponnesian League. Sparta sat up a council with the Peloponnesians which they voted to start war upon the Athenians. With the official motives of this war being to liberate Greece from the Athenian Empire, and its oppression of the incorporated territories of the Delian League. By dispatching ambassadors to the king of the Persians, the Peloponnesian League urged him to ally himself with them, while they also treated by means of ambassadors with their allies in Sicily and Italy and persuaded them to come to their aid with two hundred triremes. For their own part they, together with the Peloponnesians, got ready their land forces, made all other preparations for the war, and were the first to commence the conflict. (LacusCurtius • Diodorus Siculus — Book XII Chapters 41 59 .
One side being the Athenian Empire against the Peloponnesian League. Sparta sat up a council with the Peloponnesians which they voted to start war upon the Athenians. With the official motives of this war being to liberate Greece from the Athenian Empire, and its oppression of the incorporated territories of the Delian League. By dispatching ambassadors to the king of the Persians, the Peloponnesian League urged him to ally himself with them, while they also treated by means of ambassadors with their allies in Sicily and Italy and persuaded them to come to their aid with two hundred triremes. For their own part they, together with the Peloponnesians, got ready their land forces, made all other preparations for the war, and were the first to commence the conflict. (LacusCurtius • Diodorus Siculus — Book XII Chapters 41 59 .