The creation of the EEC eliminated tariffs, quotas and tariff preferences for products between Member States, which are the preconditions for the creation of a free trade area (ECEA). The UK remains part of the free trade agreement during the transition period of the Brexit withdrawal agreement. The UK remains a part of the internal market during the transition period of the Brexit withdrawal agreement. The Agreement on the European Economic Area (EEA) allows Norway, Iceland and Liechtenstein to participate in the European single market without joining. The four fundamental freedoms apply. However, there are restrictions on fishing and agriculture. Switzerland is bound to the European Union by bilateral agreements between Switzerland and the EU, the content of which is different from that of the EEA agreement. The agreements envisaged include the fifth phase of economic integration or EMU, the Schengen Agreement and the common security and defence policy. Global trading blocs such as the EU are not uncommon. The United States, along with Mexico and Canada, developed the North American Free Trade Agreement (NAFTA) to create a global trading bloc.
Japan and neighbouring countries cooperate as an East Asian community (EAC), which is not an official organization but is a recognized entity that acts as a central economic sector with its own alliances. Other economic trading blocs, larger or smaller, exist all over the world. Each continent has organizations that promote economic development for their regions or countries. Many of these agreements have become a kind of economic supranationalism. The EU also maintains close relations with the North Atlantic Treaty Organization (NATO), as indicated in the Berlin Plus agreement. It is a comprehensive set of agreements concluded on 16 December 2002 between NATO and the EU. This agreement gives the EU the opportunity to use NATO assets in case it wants to act independently in the event of an international crisis, provided NATO does not want to act itself – the so-called “right to first refusal.”  From 1948 to 1952, the MARSHALLus initiative was implemented by U.S. Secretary of State George Marshall after World War II to support the reconstruction of war-torn Europe with U.S. aid and trade relations (1948-52). helped rebuild war-torn Europe, with the help of the United States and trade ties. U.S.
companies and businesses have benefited from increased international trade with Europe. But to prevent European nations from returning to war, there had to be an economic trade policy that fostered a strong business climate. In 1957, France, West Germany, the Netherlands, Luxembourg, Italy and Belgium came together and signed the Treaty of Rome, which created the common market created by the Treaty of Rome, to create common institutions and implement trade and trade standards. This agreement was the necessary structure to unify Europe in 1992 within the framework of a European Union (EU). Despite many problems, constant efforts have been made for European unification since the Second World War. The EU was the structure of a common economic system with an agreed governing body and was conceived as an economic trading bloc capable of competing with the United States and Japan.