Appointment of Interest
Apr 16 Albrecht von Wallenstein appointed supreme military commander of the Holy Roman Empire
- May 25 Albrecht von Wallenstein recaptures Prague on Saksen
Victory in Battle
Jun 4 Prince Frederick Henry, Prince of Orange conquers Venlo
- Jun 5 Prince Frederick Henry, Prince of Orange conquers Roermond
- Jun 8 Frederick Henry, Prince of Orange, conquers Sittard
- Jun 20 Britain grants 2nd Lord Baltimore rights to Chesapeake Bay area
- Jul 23 Three hundred colonists bound for New France depart from Dieppe, France
- Aug 22 Prince Frederick Henry, Prince of Orange occupies Maastricht
- Aug 28 Henry Casimir I appointed viceroy of Drenthe
Battle of Interest
Sep 1 Battle at Castelnaudary: Henri de Montmorency's rebel army loses to French royalist forces loyal to Louis XIII
- Sep 3 Battle of Nuremberg: Duke Wallenstein beats Sweden
- Oct 5 Henry Casimir I appointed viceroy of Groningen
- Nov 16 Battle of Lützen: Significant battle of Thirty Years' War - Swedish and Saxon forces defeat the Holy Roman Empire, at cost of the death of Swedish King Gustavus Adolphus