Interlude or "Peace of Nicias"

• 421 peace of Nicias including return of Spartan prisoners  
• 421 The Athenians recapture Scione in Thrace; all of the men were put to death; all of the women and children were enslaved.
• 418 Sparta restores its leadership of the Peloponnesian League with a victory over the Argive League at the Battle of Mantinea--the largest hoplite battle of the war (10,000 hoplites on each side).  
• 416 Athenians beseige the island of Melos; when it capitulates, all the men are killed and all the women and children enslaved.  
• 415-13 the Sicilian Expedition