Editing 1631 (section)

=== April&ndash;June ===
* [[April 13]] &ndash; [[Thirty Years' War]]: [[Gustavus Adolphus of Sweden]] [[Battle of Frankfurt an der Oder|defeats an imperial garrison]] at the city of [[Frankfurt an der Oder]].
* [[May 18]] &ndash; In [[Dorchester, Boston|Dorchester]], Boston, [[John Winthrop]] takes the oath of office, and becomes the first [[Governor of Massachusetts]].
* [[May 20]] &ndash; [[Thirty Years' War]]: After a two-month siege, the [[Imperial Army of the Holy Roman Emperor]], under the command of [[Johann Tserclaes, Count of Tilly]] sacks the Protestant German city of [[Magdeburg]], and [[Sack of Magdeburg|massacres over 20,000 inhabitants]]. Shocked by the massacre, many Protestant states in the [[Holy Roman Empire]] decide to ally with [[Gustavus Adolphus of Sweden]], and support his ongoing invasion.
* [[May 28]] &ndash; [[William Claiborne]] sails from England to establish a trading post on [[Kent Island, Maryland|Kent Island]], the first English settlement in [[Maryland]].<ref>{{cite book|author=William R. Howell|title=The Government of Kent County, Maryland, Historical and Descriptive|url=https://books.google.com/books?id=84sB3pBbXlQC|year=1931|publisher=Published through the cooperation of Washington College|page=1}}</ref>
* [[May 30]]
** [[Thirty Years' War]]: [[Bavaria]] and France sign the [[Treaty of Fontainebleau (1631)|Treaty of Fontainebleau]], forming a secret alliance; however, this does not last long.
** ''[[La Gazette (France)|Gazette de France]]'', the first weekly French newspaper, is published.
* [[June 17]] &ndash; The death in childbirth of [[Mumtaz Mahal]] at [[Burhanpur]] causes her husband [[Shah Jahan]] to commission the [[Taj Mahal]] at [[Agra]], as a [[mausoleum]] for her. Construction is started in [[1632]], and finished in [[1653]].
* [[June 19]] &ndash; [[War of the Mantuan Succession]]: The [[Treaty of Cherasco]] is signed, ending the War of the Mantuan Succession.
* [[June 20]] &ndash; [[Algiers|Algerian]] pirates [[Sack of Baltimore|sack]] [[Baltimore, County Cork]], in Ireland.