The Great War was not only about acquiring territories, it was also about political beliefs, juridical norms, economic interests, within but also outside Europe, in a world still largely dominated by the major European powers. This chapter discusses the largely competitive and mutually influenced definition of war aims on both sides, and the secret and complex peace feelers and clandestine diplomacy which took place during the war. The immediate influence of Wilson, through the immediate weight of US economic power and its financial aid to the Allies, and the prospect of a serious military contribution from 1918, forced the warring nations to take Wilsonian principles into account in their definition of war aims. An inter-Allied conference in London at the beginning of December 1918 had settled the location for the Peace Conference and the broad lines of the programme, generally following the proposals of French diplomacy.