| March 24 | Battle at Jankov Bohemia: Sweden beatS RC emperor Ferdinand III |
| April 2 | Robert Devereux resigns as parliament supreme commander |
| April 3 | English parliament accept Self-Denying Ordinance |
| April 7 | Michael Cardozo becomes 1st Jewish lawyer in Brazil |
| June 14 | Battle at Naseby Leicester: New Model army under Oliver Cromwell and Thomas Fairfax beats royalists |
| July 10 | Battle at Langport Somerset: Cromwell's New Model-army beats Royalists |
| July 13 | Aleksei Romanov succeeds his father Michael as czar of Russia |
| July 23 | Aleksei Mihailovitch Romanov succeeds his father Michael as czar |
| August 3 | Battle of Allersheim: French defeat Bavarians |
| August 13 | Sweden and Denmark sign Peace of Bromsebro |
| August 30 | Dutch and Indians sign peace treaty (New Amsterdam (NY)) |
| September 11 | Thomas Fairfax' New Model-army occupies Bristol |
| November 4 | Prince Frederik Henry conquerors Holly |
