Peloponnesian War

The Peloponnesian War (Πόλεμος τῶν Πελοποννησίων) (431–404 BC) was an ancient Greek war fought between Athens and Sparta and their respective allies for the hegemony of the Greek world. The war remained undecided for a long time, until the decisive intervention of the Persian Empire in support of Sparta. Led by Lysander, the Spartan fleet, built with Persian subsidies, finally defeated Athens and started a period of Spartan hegemony over Greece. Historians have traditionally divided the war into three phases. The first phase (431–421 BC) was named the Ten Years War, or the Archidamian War, after the Spartan king Archidamus II, who launched several invasions of Attica with the full hoplite army of the Peloponnesian League, the alliance network dominated by Sparta (then known as Lacedaemon). However, the Long Walls of Athens rendered this strategy ineffective, while the superior navy of the Delian League (Athens' alliance) raided the Peloponnesian coast to trigger rebellions within Sparta. The precarious Peace of Nicias was signed in 421 BC and lasted until 413 BC. Several proxy battles took place during this period, notably the battle of Mantinea in 418 BC, won by Sparta against an ad-hoc alliance of Elis, Mantinea (both former Spartan allies), Argos, and Athens. The main event was nevertheless the Sicilian Expedition, between 415 and 413 BC, during which Athens lost almost all its navy in the attempted capture of Syracuse, an ally of Sparta. The Sicilian disaster prompted the third phase of the war (413–404 BC), named the Decelean War, or the Ionian War, when the Persian Empire supported Sparta in order to recover the suzerainty of the Greek cities of Asia Minor, incorporated into the Delian League at the end of the Persian Wars. With Persian money, Sparta built a massive fleet under the leadership of Lysander, who won a streak of decisive victories in the Aegean Sea, notably at Aegospotamos, in 405 BC. Athens capitulated the following year and lost all its empire.

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