Answer:
Churchill replaced Chamberlain as Britain's new prime minister shortly after World War ll began because Churchill had a better understanding of the situation with Hitler than Chamberlain did.
Step-by-step explanation:
Churchill was aware that diplomacy would not work with Hitler and that the best way to reach a resolution was through tactics as well as military force. Churchill served as Prime Minister of the United Kingdom from 1940 to 1945, when he led Britain to victory in the Second World War.