 Roosevelt wrote to Kaiser Wilhelm II, calling Moore "my young cousin" and secured his admission to the German artillery school, the first foreigner to attend.Moore spent much of 1909 and 1910 at the school, and was careful to appear to be a lazy but amiable officer, while soaking up all the knowledge he could.He returned to the United States in April 1910, prolonging his stay in Europe for six weeks so he would qualify as a non-resident for customs fees.