Winston Churchill delivered his famous 'Blood, Toil, Tears and Sweat' speech to the House of Commons on May 13, 1940, shortly after he became the Prime Minister of the United Kingdom. This speech was significant as it was his first address as Prime Minister, aimed at uniting the nation and Parliament in the face of the challenges posed by World War II. The audience consisted of the members of Parliament who were present in the House of Commons, as well as the broader British public, whom Churchill sought to inspire and rally for the war effort. The speech emphasized the need for unity and determination during a time of crisis.