Churchill had taken over as the British Prime Minister on 10 May, eight months after the outbreak of World War II in Europe. He had done so as the head of a multiparty coalition government, which had replaced the previous government (led by Neville Chamberlain) as a result of dissatisfaction with the conduct of the war, demonstrated by the Norway debate on the Allied evacuation of Southern Norway.
Coincidentally, the German Wehrmacht offensive in the Low Countries and France had begun on 10 May with the invasion of the Netherlands, Belgium and Luxembourg. Churchill had spoken to the House of Commons as Prime Minister for the first time on 13 May, to announce the formation of the new administration: