{"id":62,"canonical_url":"https://www.kudos365.com/today-in-history/events/431bce-apr-4--62","name":"Circa 431 BCE ","year":-431,"era":"BCE","month":4,"day":4,"url":"https://www.kudos365.com/today-in-history/events/431bce-apr-4--62","iso-date":"-0431-04-04","precision":"year-month-day","description":"\u003cp\u003eThe Peloponnesian War between Athens and Sparta officially begins on April 4, 431 BCE., starting with a surprise night attack on the city of Plataea by Thebes, an ally of Sparta.\u003cbr\u003e\u003c/p\u003e","additional_details":"\u003cp\u003eThe conflict was a 27-year struggle for dominance in ancient Greece, fueled by the conflicting powers and interests of Athens's naval empire and Sparta's formidable land army. The war ultimately devastated both cities and the Greek world.\u003c/p\u003e","photo":"","created_at":"2025-03-11T13:55:59-07:00","updated_at":"2026-05-14T22:22:11-07:00","breadcrumbs":{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"April History","item":"https://www.kudos365.com/today-in-history/april"},{"@type":"ListItem","position":2,"name":"April 4","item":"https://www.kudos365.com/today-in-history/april-4"}]},"schema":{"@context":"https://schema.org","@type":"Thing","@id":"https://www.kudos365.com/today-in-history/events/431bce-apr-4--62#eventK365","name":"Circa 431 BCE ","headline":"The Peloponnesian War between Athens and Sparta officially begins on April 4, 431 BCE - Circa 431 BCE","description":"The Peloponnesian War between Athens and Sparta officially begins on April 4, 431 BCE., starting with a surprise night attack on the city of Plataea by...","url":"https://www.kudos365.com/today-in-history/events/431bce-apr-4--62","additionalType":"HistoricalEvent","inLanguage":"en","datePublished":"2025-03-11T13:55:59-07:00","dateModified":"2026-05-14T22:22:11-07:00","publisher":{"@id":"https://www.kudos365.com/#organizationK365"},"temporalCoverage":"-0431-04-04","isPartOf":[{"@id":"https://www.kudos365.com/#websiteK365"},{"@type":"CollectionPage","@id":"https://www.kudos365.com/today-in-history/april","name":"What Happened in April History"},{"@type":"CollectionPage","@id":"https://www.kudos365.com/today-in-history/april-4#pageK365","name":"What Happened on April 4"}]}}