The League of Nations creates mandates and recognizes Jewish "title" over the land in Palestine
The Paris Peace Conference was a set of formal and informal diplomatic meetings in 1919 and 1920 after the end of World War I, in which the victorious Allies set the peace terms for the defeated Central Powers. Dominated by the leaders of Britain, France, the United States and Italy, the talks resulted in five treaties that rearranged the maps of Europe and parts of Asia, Africa and the Pacific Islands, and also imposed financial penalties. Germany, Austria-Hungary, Turkey and the other losing nations were not given a voice in the deliberations; this later gave rise to political resentments that lasted for decades.
The British dominions wanted their reward for their sacrifice. A League of Nations mandate was a legal status for certain territories transferred from the control of one country to another following World War I. The Ottoman Empire was to be divided up between Britain and France.
There were three levels of mandates, depending on how close the territory was to self governance. The first group, or Class A mandates, were territories formerly controlled by the Ottoman Empire that were deemed to “… have reached a stage of development where their existence as independent nations can be provisionally recognized subject to the rendering of administrative advice and assistance by a Mandatory until such time as they are able to stand alone. The wishes of these communities must be a principal consideration in the selection of the Mandatory.”
The February 1919 statement included the following main points: recognition of Jewish “title” over the land, a declaration of the borders (significantly larger than in the prior Sykes-Picot agreement), and League of Nations sovereignty under British mandate. An offshoot of the conference was convened at San Remo in 1920, leading to the creation of the Mandate for Palestine, which was to come into force in 1923.