What led to Chamberlain's downfall?

Neville Chamberlain's political downfall was primarily driven by the catastrophic failure of his pre-war appeasement policy toward Nazi Germany and the severe military setbacks suffered by Allied forces during the early months of World War II. As Prime Minister, his administration's reliance on diplomatic negotiations with Adolf Hitler culminated in the broken promises of the Munich Agreement and the sudden German invasion of Poland, which forced Britain into war under unprepared conditions. Public and parliamentary outrage peaked following the disastrous Norwegian Campaign in April 1940, leading to a fierce parliamentary debate where even members of his own Conservative Party revolted against his leadership, forcing his resignation and paving the way for Winston Churchill to form a coalition government.