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 II began on 1st September 1939, as Germany invaded Poland. On 3 September, Britain, France, and the members of the Commonwealth declared war on Germany. They could not help Poland much and only sent a small French attack on Germany from the West.