What forces oppose the aggressors in the first period of the Second World War?

When World War II began, the entire civilized world was engulfed in a whole cycle of events. The first to oppose Hitler’s aggression were France and Britain. In fact, they declared war immediately after Germany entered Polish territory. In the end, they were unable to suppress German imperialism. The troops of the Third Reich captured Poland, and later France was also occupied. At that time, Germany had one serious enemy – Britain, but she did not dare to openly oppose the aggressor, but began military operations against Italian troops in North Africa.