The history of the United Nations is the history of a search for a global, all embracing system of collective security. The aim was to prevent wars and if they happened to bring fighting to a swift end by finding a compromise solution. It would be based on the equality of all peace-loving states. The Soviet Union vetoed the admission of Ceylon in 1948 on the basis that it would strengthen the pro-Western majority. The first issue, in January 1946, which was referred to the UN Security Council, was the Iran crisis at the behest of Tehran. The Soviet Union objected strongly to it appearing on the agenda but the US and the UK ensured that it was debated. The Palestinian crisis was one of the most exceptional episodes of the Cold War in that the United States and the Soviet Union agreed and together opposed the United Kingdom. The Berlin Blockade appeared on the agenda in October 1948.