In short
In 431 BC, Athens and Sparta—the two dominant powers of ancient Greece—went to war over control of the Greek world. The conflict lasted 27 years and killed tens of thousands, ultimately draining both city-states and reshaping the balance of power in the Mediterranean.
How it unfolded.
The five-minute version
What actually happened.
The Peloponnesian War was fought in the Eastern Mediterranean between the Athenian-led Delian League and the Spartan-led Peloponnesian League from 431 to 404 BC for hegemony over Ancient Greece. Initially inconclusive, the intervention of the Persian Empire in support of Sparta in 413 BC allowed the Spartan coalition to decisively defeat Athens, beginning a period of Spartan hegemony over Greece.
As it was happening
11 voices, 9924 days.
One beat at a time. Click any dot on the timeline to jump, press play for autoplay, or use the arrow keys to step.
Athens surrenders
Facing starvation and military defeat, Athens capitulates. Sparta imposes harsh terms: dismantling of the long walls, loss of navy, and oligarchic rule by the Thirty Tyrants.
Voices from this moment (1)
Athens surrenders
Apr 1
“Facing starvation and military defeat, Athens capitulates.”
As it was happening
11 voices, 9924 days.
Day 0 · April 1, 404
Athens surrenders
Facing starvation and military defeat, Athens capitulates. Sparta imposes harsh terms: dismantling of the long walls, loss of navy, and oligarchic rule by the Thirty Tyrants.
“Facing starvation and military defeat, Athens capitulates.”
- Athens surrenders, Apr 1
Day 518 · September 1, 405
Battle of Aegospotami
Spartan navy under Lysander destroys the last Athenian fleet, cutting off grain supplies from the Black Sea.
“Spartan navy under Lysander destroys the last Athenian…”
- Battle of Aegospotami, Sep 1
Day 3197 · January 1, 413
Persia backs Sparta
The Persian Empire begins funding Spartan naval operations against Athens, tipping the military balance decisively.
“The Persian Empire begins funding Spartan naval operations…”
- Persia backs Sparta, Jan 1
Day 3440 · September 1, 413
Syracuse disaster
The Athenian fleet is destroyed and army trapped; survivors executed or enslaved. Athens loses roughly 7,000 soldiers and its strategic initiative.
“The Athenian fleet is destroyed and army trapped; survivors…”
- Syracuse disaster, Sep 1
Day 4078 · June 1, 415
Syracuse expedition launches
Athens sends 134 ships and 5,100 hoplites under Alcibiades to conquer Syracuse in Sicily, vastly overextending its resources.
“Athens sends 134 ships and 5,100 hoplites under Alcibiades…”
- Syracuse expedition launches, Jun 1
Day 9406 · January 1, 430
Plague strikes Athens
A devastating plague kills roughly one-third of Athens' population, including general Pericles in 429 BC, weakening the city's war effort.
“Sparta Declares Supremacy - Peloponnesian League United…”
- Spartan Ephorate Records, Apr 22
“A devastating plague kills roughly one-third of Athens'…”
- Plague strikes Athens, Jan 1
Day 9891 · May 1, 431
War declared
Sparta and Athens formally begin hostilities over Corinthian disputes and Athens' dominance in the Aegean.
“Corinthian Clash Ignites Open War - Athens Mobilizes Fleet…”
- Athenian Agora Gazette, May 15
“Thebes Pledges Cavalry Strength to Spartan Alliance Against…”
- Theban Proclamations, May 28
“Maritime Blockade Looms - Athenian Naval Supremacy…”
- Corinthian Trade Chronicles, Jun 3
“Sparta and Athens formally begin hostilities over…”
- War declared, May 1
Front pages.
3 outlets carried the story: Athenian Agora Gazette, Spartan Ephorate Records, Corinthian Trade Chronicles.
Media coverage
What the world was reading.
4 pieces, ranked by how much they shaped the discourse.
Athenian Agora Gazette
Newspaper · Attica, Greece · May 15, 431
"Corinthian Clash Ignites Open War - Athens Mobilizes Fleet Against Peloponnesian Alliance"
Synthesized from period reporting - The Athenian demos convened yesterday as war was formally declared against the Spartan-led coalition. Citizens gathered in the Agora to hear Pericles address the gravity of the conflict, with the navy ordered to full readiness against Corinthian and Peloponnesian forces.
- Apr 22, 431
Spartan Ephorate Records
Newspaper · Laconia, Greece
"Sparta Declares Supremacy - Peloponnesian League United Against Athenian Tyranny"
Synthesized from period reporting - The five ephors of Sparta have formally denounced Athens' imperial ambitions and called upon the allied cities of the Peloponnese to stand unified. Corinth, Thebes, and Megara have pledged their armies to the cause.
- May 28, 431
Theban Proclamations
Newspaper · Boeotia, Greece
"Thebes Pledges Cavalry Strength to Spartan Alliance Against Democratic Athens"
Synthesized from period reporting - The Theban council announced mobilization of elite mounted regiments to support the Peloponnesian cause. Leaders cited Athenian expansionism and the recent affair at Plataea as justification for joining the broader anti-Athenian coalition.
- Jun 3, 431
Corinthian Trade Chronicles
Newspaper · Corinth, Greece
"Maritime Blockade Looms - Athenian Naval Supremacy Threatens Isthmus Commerce"
Synthesized from period reporting - Merchant guilds across Corinth report alarm as Athenian triremes patrol trade routes. The chamber of commerce warns of catastrophic losses should the navy succeed in strangling the city's access to grain shipments and eastern markets.
Captured in time.
Captured before it changed
The web as it looked, the day it happened.
Wayback Machine snapshots of the pages people actually loaded that day. Click any card to open the archive at full size.
Sources & citations.
Sources
Where this came from.
Every claim on this page traces to a public, license-clean source. We don't asterisk well.
Wikipedia
1 source- 1.Peloponnesian War
en.wikipedia.org