Blitzkrieg

September 1st 1939:In contravention of an agreement made the previous year with British Prime minister Neville Chamberlain, Adolf Hitler's Army invades Poland.September 2nd 1939:Chamberlain issues an ultimatum to Hitler. Withdraw all troops from Poland within 24 hours or a state of war will exist between Britain and Germany.Hitler chooses to disregard the ultimatum and sends an invasion force of more than one million troops across the English Channel to England by sea and by air.September 3rd 1939?Great Britain is occupied.