Question

After World War II, countries in this region, joined together politically and

economically to that eventually led to the creation of the European Union.

Answer 1

Answer: countries of Western Europe. Some of them received financial support of Marshall Plan (1947, USA) and entered North Atlantic Treaty (1949, NATO). Winston Churchill not only identified emergence of Iron Curtain (Fulton, USA) but also federalist organization of European states. In 1952 six west-European states decided to form European Coal and Steel Community which is viewed today as a first step to federation of European Union. These states were: Benelux, Western Europe, Great Britain, France and Italy

Step-by-step explanation:

Answer 2

Germany, France, UK (they are quitting soon), Benelux (Belgium, Netherlands, Luxembourg), Italy, Romania, Bulgaria, Hungary, Slovenia, Croatia, Poland, Slovakia, Austria, Denmark, Greece, Spain, Portugal, Lithuania, Estonia, Latvia Cyprus, Malta, Finland, Sweden, Ireland (YEAR 2019)

Founders are Germany, France, Italy, Belgium, Luxembourg and Netherlands