June 14, 1690
King William III (of Orange) landed in Ireland to confront former King James II. Ireland was controlled by Roman Catholics loyal to James, and Franco-Irish Jacobites arrived from France with French forces in March 1689 to join the war in Ireland and contest Protestant resistance at the Siege of Derry. William sent his navy to the city in July, and his army landed in August. After progress stalled, William personally intervened to lead his armies to victory over James at the Battle of the Boyne on 1 July 1690, after which James II fled back to France.