European Union By a001753 1945 BCE End of World War 2 1951 ECSC is formed 1957 The treaties of Rome are signed. 1973 Denamark Irland and UK become members 1979 First direct elections of the E.P 1992 The treaty of Maastrich. 2001 The Big Ban of EU enlargment. 2002 The Euro is adopted by 12 countries. 2007 Threaty of Lisboa is signed 2008 Solvenia takes over the presidency.