He stood firmly by the Congress System established at Vienna by which the great powers had agreed to resolve major crises through international negotiation, and realized that any action in the Greek crisis was bound to be opposed. By October 1821 a European policy of international mediation over Greece had already been coordinated by Prince Metternich, the Austrian Foreign Minister and chief conductor of the Concert of Europe, together with the British Foreign Secretary, Lord Castlereagh. So when the Tsar appealed to them for support against Turkey, in February 1822, it was agreed to convene
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