July 20, 356 BC - Alexander the Great is born.
July 20, 1304 - Edward I takes control of Scotland's Stirling Castle.
July 20, 1398 - Roger Mortimer, 4th Earl of March died. For a short time he was Richard II's acknowledged heir to the throne.
July 20, 1524 - Queen Claude of France, first wife of Francis I and eldest daughter of Louis XII, died.
July 20, 1944 - Hitler manages to survive another assassination attempt (code named Valkyrie) inside his Wolf's Lair bunker, this one lead by Claus von Stauffenburg. It was planned by the German Resistance to overthrow the Nazi regime.
July 20, 1944 - FDR wins the Democratic nomination for President for an amazing 4th (and final) time.