The Germans proposed to restore the Grand Duchess to her functions, but Charlotte refused, mindful of her sister's experiences of remaining in Luxembourg under German occupation during the First World War. By 29 August 1940 Grand Duchess Charlotte was in London where she began to make supportive broadcasts to her homeland using the BBC. Later she travelled to the United States and to Canada. Her children continued their schooling in Montreal while she had several meetings with President Roosevelt who encouraged her itinerant campaigning across the country in support of his own opposition to isolationism which was a powerful political current until the Pearl Harbor attacks. In the meantime Luxembourg, along with the adjacent French Moselle department, found itself integrated into an expanded Germany under the name "Heim ins Reich", which left Luxembourgers required to speak German and liable for conscription into the German army.