In 433 BCE, Athens concluded an alliance with Corcyra, and started to besiege Potidaea due to it threatening the position of Corinth. The fact that Corcyra was one of the few city states with their own navy made the Spartans view the alliance in an attacking manner. Sparta also feared that Athens was becoming too powerful but tried to prevent war by signing the Thirty Years Peace. Peace was possible; however, Athens would revoke the measures against Sparta's ally Megara. The Athenian leader Pericles
In 433 BCE, Athens concluded an alliance with Corcyra, and started to besiege Potidaea due to it threatening the position of Corinth. The fact that Corcyra was one of the few city states with their own navy made the Spartans view the alliance in an attacking manner. Sparta also feared that Athens was becoming too powerful but tried to prevent war by signing the Thirty Years Peace. Peace was possible; however, Athens would revoke the measures against Sparta's ally Megara. The Athenian leader Pericles