Germany had provoked Great Britain with the invansion of Poland, which led to Great Britain declaring war.
In Germany there were many groups that were anti-Nazi between 1933 and 1945. There were some individuals that had plans to remove Hitler from power. Many people dislike Hitler so there has been at least 27 failed attempts to kill him. The first assassination attempt to remove Hitler was led by Georg Elser in November 1939. He read in the newspapers that Hitler would be having a Nazi Party meeting on 8 November, in the Bürgerbräukeller in Munich. Georg had stole explosives from his workplace and built a bomb with a timer. He managed to place the bomb behind the speaker's rostrum. The bomb's timer had went off after Hitler's speech killing 7 people except Hitler.