40s
decade

The 40s ran from January 1, AD 40, to December 31, AD 49. Following the assassination of Caligula, Claudius became Roman emperor in AD 41. In AD 43 he sent Aulus Plautius with four legions across the Channel, initiating the decades-long Roman conquest of Britain.
The Trưng sisters' rebellion broke out in the far south of Han China in AD 40, when Vietnamese leader Trưng Trắc and her sister Trưng Nhị rose against Han authority in Jiaozhi, in what is now northern Vietnam. Han China dispatched General Ma Yuan to suppress the rebellion in AD 42. The Han army had suppressed the uprising by AD 43.
Christianity reached Egypt with the founding of the Church of Alexandria, whose first patriarch was Mark the Evangelist. James the Great, one of the Twelve Apostles and according to the New Testament, the first of them to be martyred, was killed in AD 44. Claudius expelled Jews from Rome at some point between AD 41 and 53. Scholars explain the measure to his concern with public order in Rome rather than a policy directed against Judaism.
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This entry incorporates text from “40s” 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.