The job of a film director is extremely challenging which requires the person to have knowledge of almost all the fields of film production. The success or failure of a film more or less depends on the capabilities of a film director.
On September 1, 1939, Hitler invaded Poland from the west; two days later, France and Britain declared war on Germany, beginning World War II. On September 17, Soviet troops invaded Poland from the east.
World War Two included the war between the USSR and Japan, which never officially ended. Therefore, World War One and World War Two overlapped by 21 years (with many of the same combatant countries), therefore they should be considered one war, therefore World War Two started on July 28th, 1914.