1952 - Post war co-operation led France, West Germany, Italy, Belgium, the Netherlands and Luxembourg to form the European Coal and Steel Community (ECSC)
1957 - Same 6 countries signed the Treaty of Rome, creating the European Economic Community (EEC) in 1958
1965 - After the Treaty of Brussells was signed, the ECSC, EEC and the European Atomic Energy Community (Euratom) were merged creating the European Communities (EC)