This Day in History
Today: September 23, 2026
38
Drusilla, Caligula's sister who died in June, with whom the emperor is said to have an incestuous relationship, is deified.[1]
1122
Pope Callixtus II and Holy Roman Emperor Henry V agree to the Concordat of Worms to put an end to the Investiture Controversy.
1338
The Battle of Arnemuiden, in which a French force defeats the English, is the first naval battle of the Hundred Years' War and the first naval battle in which gunpowder artillery is used.[2]
1409
The Battle of Kherlen is the second significant victory over Ming dynasty China by the Mongols since 1368.
1459
The Battle of Blore Heath, the first major battle of the English Wars of the Roses, is won by the Yorkists.[3]
1561
King Philip II of Spain issues cedula, ordering a halt to colonizing efforts in Florida.[4]
1779
American Revolution: John Paul Jones, naval commander of the United States, on board the USS Bonhomme Richard, wins the Battle of Flamborough Head.[5]
1803
Second Anglo-Maratha War: The Battle of Assaye is fought between the British East India Company and the Maratha Empire in India.[6]
1821
Tripolitsa, Greece, is captured by Greek rebels during the Greek War of Independence.
1846
Astronomers Urbain Le Verrier, John Couch Adams and Johann Gottfried Galle collaborate on the discovery of Neptune.
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