The Battle of Megara was fought in 424 BC between Athens and Megara, an ally of Sparta. The Athenians were victorious. Megara was in the country of Megarid, between central Greece and the Peloponnese. Megara, an ally of Sparta, consisted of farming villages, with flat plains and foothills, and hosted two harbors: Pagae (modern Alepochori-Corinthian Gulf) and Nisaia (Saronic Gulf), making it a prime focus of contention1. Athenian threat Attica had been under siege by the Peloponnesian army led by the Spartan king, Archidamus II. The land siege kept Athenians stuck in their city. However, with the Peloponnesian withdrawal, Athens began to attack. From as early as 431 BC, Megara was under consistent attack from Athens. During the first invasion, Athens brought 10,000 Athenians and numerous allies. Athens then set up a fort on Salamis, near Nisaia, and created shipping blockades. The blockades delayed imports of food and supplies to Megara. Megarians still had control of Pagae, but Megara was effectively isolated from the western food supplies. Unable to produce normal proportions of food, the situation in Megara began to become dire. Unrest in Megara Urged by the Megarian oligarchy in 429, the Peloponnesian fleet attacked the Athenian fort at Salamis. Unknown to the Peloponnesians, the attack was revealed to Athens by beacon lights. Athens dispatched a fleet from the Athenian port of Piraeus. The Peloponnesian attack was abandoned because the Megarian ships were in a state of disrepair. Under the rule of the pro-Spartan and pro-Corinthian oligarchy, Megara lost the port city of Minoa to Athens in 427, was a contributing factor in more civil unrest. Megarian revolutions against the oligarchy began shortly after and Megara became democratic. The oligarchy were exiled. Many exiles were permitted by Sparta to inhabit the Boeotian town of Plataea for a year2. Boeotia separated Megara and Athens with high mountains ranges in the north1. The Spartans were then able to prevent interactions between Megarian Democrats and Athenians on Minoa2. The exiled Megarians in Plataea, began northern raids in Megarid and took Pagae. With oligarch sympathizers still in Megara, the oligarchs returned to Megara in 427 BC, and democracy collapsed. Spartan role It is suspected that Athens prevented food supplies to gain control of Megara and prevent further invasions of Attica by the Peloponnesians. However, Athens' capture of Pylos in 425 detained the Peloponnesian army in Messenia, which lessened the importance of Megara to