Why did France and Britain appease the fascist powers 3 reason?

Answer 1

1) Britain and France did not want war , 2) They were unprepared for war , 3) popular opinion would not support another war especially with WW1 still a recent memory .

Answer 2

The big powers like U.S. was adopting an isolationist policy while USSR decline to join league of nations and even signed a non-aggression pact with Germany as well.

The whole responsibility of maintaining peace was in the hands of Britain and France which ultimately were trying to recover from the recent incurred economic losses and fearing an expansionary Communist USSR on the east.

Thus everyone was playing in silos for their own self-interests and hence divided on the issue of checking Germany's actions in the region.

Further, the Fascist powers too miscalculated the scenario and was hoping that noone would act even if Germany invades Poland. U.S. was also silent on Japan's adventures in Manchurian region.

Thus, a war was in the making.