Editing European Union (section)

==== Former members ====
[[Article 50 of the Treaty on European Union|Article 50]] of the [[Treaty of Lisbon|Lisbon Treaty]] provides the basis for a member to [[Withdrawal from the European Union|leave the EU]]. Two territories have left the union: [[Greenland]] (an [[autonomous area|autonomous province]] of Denmark) withdrew in 1985;<ref>{{Cite web |title=The Greenland Treaty of 1985 |url=http://eu.nanoq.gl/Emner/EuGl/The%20Greenland%20Treaty.aspx |url-status=dead |archive-url=https://web.archive.org/web/20110503185125/http://eu.nanoq.gl/Emner/EuGl/The%20Greenland%20Treaty.aspx |archive-date=3 May 2011 |access-date=10 November 2010 |website=The European Union and Greenland |publisher=Greenland Home Rule Government}}</ref> the [[United Kingdom]] formally invoked Article 50 of the Consolidated Treaty on European Union in 2017, and became the only sovereign state to leave when it [[Brexit|withdrew]] from the EU in 2020.