Treaty of London on Greek Independence

July 6, 1827

Britain, France, and Russia signed a treaty demanding Ottoman recognition of Greek autonomy, with armed intervention threatened if the Sultan refused. He refused. The allied fleets sailed south toward Navarino. The Concert of Europe, designed to prevent revolution, was about to fight a war on behalf of one. At Navarino the allied fleet destroyed the Ottoman-Egyptian navy, the last major battle fought entirely under sail.