Athens tries to retake Amphipolis and loses. Both leaders die: the Athenian Cleon while fleeing, the Spartan Brasidas after hearing of his victory.
The men who had taken up and rescued Brasidas, brought him into the town with the breath still in him: he lived to hear of the victory of his troops, and not long after expired.
After the battle neither Athens nor Sparta wanted to go on with the war, and the Peace of Nicias was signed in 421 BC.
Based on Wikipedia: Battle of Amphipolis
After the battle, neither the Athenians nor the Spartans wanted to continue the war (Cleon being the most hawkish member from Athens), and the Peace of Nicias was signed in 421 BC.