The Germans begin the first in a long series of bombing raids against Great Britain, as the Battle of Britain, which will last three and a half months, begins. 75 years.
World War II: the leaders of the three Allied nations, Winston Churchill, Harry S. Truman and Joseph Stalin, meet in the German city of Potsdam to decide the future of a defeated Germany. 70 years.
Second Barons' War: Battle of Evesham - the army of Prince Edward (the future king Edward I of England) defeats the forces of rebellious barons led by Simon de Montfort, 6th Earl of Leicester, killing de Montfort and many of his allies. 750 years.
British Prime Minister Winston Churchill makes the fourth of his famous wartime speeches, containing the line "Never was so much owed by so many to so few". 75 years.