At the Quebec Conference, 1943 held in Canada in August 1943, Churchill, Roosevelt and the Combined Chiefs plotted strategy against Germany. They began planning the invasion of France, codenamed Overlord using a report by the Combined Chiefs. They also discussed an increase of the bombing offensive against facilities Germany was using in France and the Low Countries. They decided to continue the buildup of American forces in Britain prior to an invasion of France. Churchill kept drawing attention to the advantages of operations in the Mediterranean theatre. They agreed to use more force to force Italy out of the war, and to occupy it along with Corsica. Military cooperation was close and successful. The Prime Minister of Canada was the host, but no Canadians attended the secret meetings.