The correct answer is that, at the point when Hitler disregarded numerous purposes of the Treaty of Versailles Neville Chamberlain, the British Primeminister was following a strategy of submission towards Germany. Chamberlian suspected that on the off chance that he enabled Hitler to redress the more unfair provisions of the bargain then he would be content and a different universe war would be deflected; at the time France was all the while recouping from WWI and was unwilling to submit any sort of power to contradicting German infringement of the arrangement. Lamentably Hitler did not stop with revamping the German military and retaking the parts of Europe that had once had a place with Germany. The German armed force walked on Czechoslovakia in 1938 as this region was never part of Germany and at the Munich gathering Hitler guaranteed to stop there; this prompted the notorious statement by Chamberlain "Peace in our chance".
Regardless of this marked guarantee by Hitler on September 1st, 1939 the German armed force walked on Poland, this was the issue that is finally too much to bear. Hitler was given a final offer that expressed that if the German military did not pull back from Poland, Britain was ready to complete its commitments to Poland and proclaim war on Germany.