| January 24 | Emperor Ferdinand II declares Albrecht von Wallenstein a traitor |
| February 17 | William Prynne tried in Star Chamber for publishing "Histrio-masti" |
| February 18 | Ferdinand II orders commander Albrecht von Wallenstein, execution |
| February 19 | Battle at Smolensk: Polish king Wladyslaw IV beats Russians |
| February 25 | Irish captain Walter Devereaux kills duke Wallenstein |
| March 1 | Battle at Smolensk: Polish King Wladyslaw IV beats Russians |
| March 3 | 1st tavern in Boston opens (Samuel Cole) |
| March 13 | Academe Franeaise opens |
| March 25 | Lord Baltimore founded Catholic colony of Maryland |
| April 6 | Heeren XIX asks "to secure Eylands Curaeao" |
| May 4 | Johan van Walbeecks fleet departs to West-Indies |
| May 31 | U.S. colony Massachusetts Bay annexes Maine colony |
| June 14 | Russia and Poland sign Peace treaty of Polianov |
| July 6 | Johan van Walbeecks ships bypass St-Anna Bay, Curacao |
| July 29 | Dutch fleet under Johannes van Walbeeck lands on Curacao |
| August 26 | Battle at Nordlingen Bavarian: emperor Ferdinand II and Spain beat Sweden and German protestants |
| August 27 | Battle of Nordingen-Bernhard of Saxe-Weimar, loses Duchy of Francomia |
| September 5 | Battle at Nordlingen: King Ferdinand III and Spain beat Sweden and German protestants |
| September 6 | Battle at Nordlingen ends in Swedish/protestant German defeat |
| October 19 | Beach Island in North sea destroyed by a heavy storm flood |
| October 20 | English King Charles I disbands new "Ship Money" tax |
