متى تحالفت فرنسا و بريطانيا العظمى ضد ألمانيا في حرب؟
France and Britain declared war on Germany when they invaded Poland in September 1939. After the Phoney War from 1939 to 1940, within seven weeks, the Germans invaded and defeated France and forced the British off the continent. France formally surrendered to Germany.
1939