Adolf Hitler made plans to invade Britain starting on September 21, 1940.
Source
The XI Summer Olympics are opened in Berlin by Adolf Hitler.
Adolf Hitler became Führer of Germany following the death of President Paul von Hindenburg.
The Prussian government lifted a ban on Adolf Hitler's speeches.
The Nazi Party killed around 1,000 people, which became known as the 'Night of Long Knives.'
President Hindenburg issued the Reichstag Fire Decree.
