The British were not at all pleased with Tokyo, and fielded even stronger complaints from Washington and from Australia. The Paris Peace Conference (1919–1920) did endorse Japan's gaining League mandates over several former German possessions. But Japan went much further and demanded that a clause be inserted in the Covenant of the proposed League of Nations, announcing the organization's commitment to racial equality. Britain and its Dominions voted no, as did the United States; the proposal never passed and the insult rankled for years. Finally the Japanese intervention in Siberia (1918-1922), while parallel to the interventions by Britain, France and the United States, seemed like too much of a land grab. By 1907 Japan had come to détente with Russia, but the 1917 collapse of the Russian Imperial government meant that Siberia seemed wide open. Japan wanted to renew the basic treaty with Britain, but increasingly vocal opposition came from the British Dominions, the United States, China, and inside Britain itself. The diplomatic solution was to end negotiations on renewal, and have all the major players endorse the naval limitations agreement of the Washington Naval Conference of 1921-1922. To Japanese disappointment, the treaty with Britain expired in 1923. Tokyo now had no allies or real friends.