Why Hitlers pact with Stalin was a key factor to Britain and France to declare war on Germany?

Answer 1

After World War 1, the Treaty of Versailles had limited Germany's military power. As chancellor, Hitler stressed that Germany wished to revise the unfair provisions. Germany, he said, only wanted rightful place among the European states. On March 9, 1935, however, Hitler announced the creation of a new air force. One week later, he began a military draft that would expand Germany's army from 100,000 to 550,000 troops. These steps were in direct violation of the Treaty of Versailles. France, Great Britian, and Italy warned against future aggressive steps. Hitler was convinced that the Western countries had no intention of using force to maintain the Treaty of Versailles. Hence, on March 7, 1936, he sent German troops to the Rhineland. According to the Treaty of Versailles, Germany was not permitted to have weapons of fortifications there. France had the right to use force against the violation of this provision but would act without British support.