Romania in the World War II was not invaded by German troops; Romania was an ally of Germany against the Soviet Union invaders (occupation of Basarabia and Northern Bukovina).
Switzerland was a neutral country and Germany did not invade it.
Hitler did not invade North Korea.
Hitler did invade the USSR on 22 June 1941.
Romania was not invaded by Germany in WW 2; Romania was an ally of Germany.
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Romania was never taken by Hitler; Romania was an ally of Germany against Soviet Union invasion.
No
About half of Europe.
Yes
Yes
No
Hitler first annexed Austria.