The European Economic Community (EEC) was a regional organisation which aimed to bring about economic integration between its member states. It was created by the Treaty of Rome of 1957. Upon the formation of the European Union (EU) in 1993, the EEC was incorporated and renamed as the European Community (EC).he European Economic Community (EEC) was a regional organisation which aimed to bring about economic integration between its member states. It was created by the Treaty of Rome of 1957. Upon the formation of the European Union (EU) in 1993, the EEC was incorporated and renamed as the European Community (EC).