27th April » The Battle of Carbisdale: A Cavalier or Royalist army from Orkney invades mainland Scotland but is defeated by a Covenanter army.
9th June » The President and Fellows of Harvard College named Harvard Corporation, the more powerful of the two administrative boards of Harvard, is established. It is the first legal corporation in the Americas.
3rd September » Third English Civil War: In the Battle of Dunbar (1650) named Battle of Dunbar, English Roundhead or Parliamentarian forces led by Oliver Cromwell defeat an army loyal to King Charles II of England and led by David Leslie, Lord Newark.
29th September » Henry Robinson (writer) known as Henry Robinson opens his 'Office of Addresses and Encounters' in Threadneedle Street, London.