On April 9, 1940, the German army invaded Denmark and Norway.
Denmark surrendered after only a few hours but the Norway resistance took the Germans longer to overcome.
The next invasions of Germany were in Belgium, Netherlands, and France in 1940.
On June 14, 1940, Paris surrendered to Germany.
The Battle of Britain started on August 8, 1940,
the German air force began to attack the British air force base. They were bombing on targeting different British industrial centres. But the Germans lost the Battle of Britain.
Italy entered the Second World War on the side of Germany.