Germany executes its invasions of Yugoslavia and Greece, and the Axis encourages an anti-British coup in Iraq.

As Germany made preparations to assist its ally Italy in the war against Greece, a coup in Yugoslavia prompted Adolf Hitler to order the invasion of that country as well. 

In summer of 1940, even as the Battle of Britain was just getting started, Adolf Hitler was already laying plans for war with the Soviet Union.

After the fall of Poland, British Intelligence's codebreaking operation at Bletchley Park became the center of efforts to decrypt messages from the Germans' supposedly unbreakable Enigma machine.