Belgium
France
The Soviet Union. Who else?
They invaded Poland.
Germany invaded France and Poland also it invaded Austria. World War 2 started because Germany said to England they wouldn't invade Poland but they did - so Poland is the easiest country to remember that was invaded!
Germany invaded Poland
Germany invaded France
Germany
Switzerland
Germany
poland
Belgium
Germany invaded Poland.
Germany invaded Poland and as a result France and England declared war on Germany.
Poland was invaded by Germany just before the war was declared.
Poland was invaded by Germany in 1939 that started World War II.
Nazi Germany and the USSR invaded Poland in 1939.