Balfour Declaration, 2 Nov. 1917.
The Declaration was a letter from British Foreign Minister Arthur Balfour, approved by the Cabinet and on behalf of the government, endorsing the establishment of a Jewish homeland in Palestine. It was given to Lord Edmund Rothschild, to bring to the Zionist Federation.
San Remo Resolution, 25 April 1920
The San Remo Conference – held in San Remo, Italy and attended by Great Britain, France, Italy, and Japan- with the United States as a neutral observer – provided a forum for the Allies to discuss mandates to be assigned following World War I. The San Remo Resolution was the first international legal document that recognized the establishment of a Jewish homeland in Palestine. It constitutes a predecessor to the more detailed Mandate for Palestine.
The Mandate for Palestine (League of Nations), 24 July 1922
After World War I, the victorious Allies decided not to appropriate for themselves the colonies of their defeated enemies. Instead, those territories considered unable to function as independent states were placed under international administration supervised by “Mandatories” of the League of Nations.
The Mandate for Palestine, with Britain assigned as Mandatory, was to do this with regards to the Jews and Palestine. In this document, which cited the Balfour Declaration, the international community unanimously called for the establishment of a Jewish homeland in Palestine.
The Mandate actually gave effect to the 25 April 1920 decision of the victorious powers at the San Remo conference in favor of a Jewish homeland in Palestine. The United States, which was not a member of the League of Nations, approved the Mandate in a joint resolution of both houses of Congress which was signed by President Warren G. Harding.
Resolution 181: Future Government of Palestine (General Assembly of the United Nations), 29 Nov. 1947.
The partition plan recommended by the United Nations General Assembly in 1947.
Resolution 242 (Security Council of the United Nations, Chapter VI), 22 Nov. 1967.
The laboriously-negotiated, much debated resolution that formed the basis for subsequent Israeli-Arab negotiations.
See here for an analysis of this resolution.