In 1957 Luxembourg, Belgium, France, the Netherlands, Germany and Italy joined together to form what?

Question

The North Atlantic Treaty was signed in Washington, D.C. in 1949 by Belgium, the Netherlands, Luxembourg, France, UK, US, Portugal, Italy, Norway, Denmark, Canada and which other country?

Answer 1

EEC
The European Economic Community (EEC) was a regional organization that aimed to bring about economic integration among its member states. It was created by the Treaty of Rome of 1957. Upon the formation of the European Union in 1993, the EEC was incorporated into the EU and renamed the European Community (EC). In 2009, the EC formally ceased to exist and its institutions were directly absorbed by the EU. This made the Union the formal successor institution of the Community.