Copenhagen criteriaThe Copenhagen criteria are the rules that define whether a country is eligible to join the European Union. The criteria require that a state has the institutions to preserve democratic governance and human rights, has a functioning market economy, and accepts the obligations and intent of the European Union. These membership criteria were laid down at the June 1993 European Council in Copenhagen, Denmark, from which they take their name.
Brexit negotiationsBetween 2017 and 2019, representatives of the United Kingdom and the European Union negotiated the terms for Brexit, the planned withdrawal of the UK from the EU. These negotiations arose following the decision of the Parliament of the United Kingdom to invoke Article 50 of the Treaty on European Union, following the UK's EU membership referendum on 23 June 2016. The negotiating period began on 29 March 2017, when the United Kingdom served the withdrawal notice under Article 50.
AtlanticismAtlanticism, also known as Transatlanticism, is the ideological belief in support of closer relationships between the peoples and governments in Northern America (the United States and Canada) and in Europe (the countries of the European Union, the United Kingdom, Ukraine, Switzerland, Norway, Iceland, etc.) on political, economic, and defense issues for the purpose of maintaining the security and prosperity of the participating countries and protect liberal democracy and the progressive values of an open society that unite them.