Appeal of 18 June as the beginning of the Resistance and Free French, historians have shown that the appeal was heard only by a minority of French people. De Gaulle's 22 June 1940 speech on the BBC was more widely heard. General de Gaulle became the "de facto" leader of the Free French Forces that had escaped to London in June 1940. Marshal Philippe Pétain, a hero of World War I, pledged to sign an armistice with Nazi Germany, and led the collaborating Vichy government while the Germans occupied the country's northern portion and several leading politicians, including Georges Mandel, Leon Blum, Pierre Mendès
Armistice of 22 June 1940 Germans thought the occupation would be a provisional state of affairs and last only until Britain came to terms, which was believed to be imminent. For instance, none of the French delegation objected to the stipulation that French soldiers would remain prisoners of war until the cessation of all hostilities. Nearly one million Frenchmen were thus forced to spend the next five years in prisoner of war camps (about a third of the initial 1.5 million prisoners taken were released or exchanged as part of the "Service du Travail Obligatoire" forced labour programme by the Germans, before the war ended).