The European Union are both international organisations. Some countries are members of both organisations, though some are members of one but not the other. That is the only connection. Apart from sharing some members, they are completely different organisations in many different ways.
The European Union and NATO are based in a few different places. It is between European and the United States.
NATO and the European Union
The European Union, NATO, United Nations.
Soviet union
The European Union, The United Nations, NATO
Belgium is a member of NATO and the European Union.
European Union and NATO are the two main ones.
Yes they are, because they are both in European Union and NATO.
Canada, usa ,France and i guess NATO and the European union
Ireland, Malta, Cyprus, Austria, Finland and Sweden are the 6 members of the European Union, that are not members of NATO.
Yes, Romania is a European state, is a member state of European Union, also member of NATO.
Among other things: part of Europe; part of the European Union; part of NATO; part of the World.