June 20
day of the year
June 20 is the 171st day of the year (172nd in leap years) in the Gregorian calendar; 194 days remain until the end of the year.
Events
Pre-1600
451 – Battle of Chalons: Flavius Aetius battles Attila the Hun. After the battle, which was inconclusive, Attila retreats. Despite suffering catastrophic losses that led to the collapse of their alliance with the Goths and the destruction of much of the Roman army, the Romans nevertheless proclaimed victory despite the lack of any clear military success.
1180 – First Battle of Uji, starting the Genpei War in Japan.
1210 – Michael I Komnenos Doukas, the first ruler of the despotate of Epirus, signs a treaty with the Republic of Venice and becomes their vassal.
1295 – The Treaty of Anagni, an attempt mediated by the papacy to end the War of the Sicilian Vespers, is signed by the crown of Aragon, the kingdom of France and kingdom of Naples.
1601–1900
1622 – The Battle of Höchst takes place during the Thirty Years' War.
1631 – The Sack of Baltimore: The Irish village of Baltimore is attacked by Barbary slave traders.
1652 – Tarhoncu Ahmed Pasha is appointed Grand Vizier of the Ottoman Empire.
Begin with the source’s own compact description: “June 20” is day of the year. The dossier treats that line as a proposition to test through June and year, not as a finished interpretation.
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The phrase “day of the year” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 22, 2026. The linked authority identifier is Q2666. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1600, 1180, 1210 and 1295.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “June 20” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.