What other European countries did Germany invade?

Are we talking about World War (II)?

If so The the countries invaded are;- Poland, Denmark, Norway, Netherlands, Belgium , Luxemburg, France, Czechoslovakia, Roumania, Bulgaria, Greece, USSR, (now divided into Ukraine, Belorus, Lithuania, Latvia, Estonia. & Russia).

Sweden, Switzerland, Spain, Portugal, Republic of Ireland. Remained politically neutral. Italy, was a partner country with Germany. Austria was 'swallowed-up' in 1938 to part of the third reich.

Finland was a special case, between USSR, Sweden, and Germany, but remained largely independent.

Great Britain remained hostile, and uninvaded.