the key events of the history of the UK By Navi|Gattouz 1066 William the Conqueror invaded England. 1169 Conquest of Ireland 1215 Magna Carta Period: 1337 to 1453 100 years' war 1534 Henri VIII and the Act of Supremacy 1603 Union of Crowns 1606 Creation of the UK's flag 1649 Commonwealth of England 1688 English revolution 1707 Union of UK 1921 Birth of Northern Ireland 1922 Creation of UK 1968 War against British authority in Northern Ireland 1973 UK in CEE 1982 Falklands War 2016 Brexit