- March 26, 1707 - England and Scotland merge into the Kingdom of Great Britain due to the Act of Union 1707
- July 4, 1776 - Some colonies in British North America declare independence as the United States
- September 3, 1783 - Great Britain recognise United States independence - Treaty of Paris (1783)
- 1808 - Kingdom of Great Britain and Kingdom of Ireland merge into the United Kingdom of Great Britain and Ireland due to the Act of Union 1800
- July 1, 1867 - Canadian Confederation, federates most remaining colonies in British North America into Canada
- December 11, 1931 - Statute of Westminster formally states that the Parliament of the United Kingdom is co-equal with Dominion parliaments.
- August 30, 1999 - East Timor referendum calls for independence
- October 25, 1999 - UNTAET formed in East Timor
- May 20, 2002 - UNTAET abolished, East Timor becomes independent