The start of progress towards cooperation between European nations.
Several European nations sign to run their coal and steel industries with a common management in order to promote cooperation.
An offshoot of the Schuman plan, the nations expanded it to make travel and trade easier between countries.
The Berlin Wall is constructed
The Schuman Plan countries remove custom duties, effectively creating the world's largest trading network.
Ireland, the UK, and Denmark are admitted to the EU.
For the first time, citizens elect members of the EU Parliament
Greece joins the EU.
Spain and Portugal join the EU.
The Berlin Wall falls.
The treaty to establish a single currency is signed, and name "European Union" is formally adopted.
Eastern European countries added to the EU
25 countries sign a treaty to establish a consitution for the EU.