Most European countries were involved in World War 1. In Western Europe, most of the fighting took place in Belgium and France and in Eastern Europe, Turkey and Bulgaria saw a lot of fighting.
Italy
The Russians .
Italy
The only non-neutral European country that was completely free of Axis control during World War 2 was England. Russia was not defeated but did cede ground to German control during the fighting.
Italy.
Nazi Germany in the European Theater of Operations, and Imperial Japan in the Pacific…
Great Britain
switzerland
Switzerland
The Axis powers (Germany and Italy) were the European powers that were fighting everyone else.
European Americans colonized in the United States. Immigration is when a person leaves their own country for another country, but according to the Europeans the United States was the "New World" and was not yet a country, thus all the fighting.