From 1964 to his death Peter served as the Royal Patron of the Sovereign Military Order of the Temple of Jerusalem in the United States. In 1963, Alexandra, who was suffering from severe depression, tried to commit suicide. Peter himself suffered from depression and alcoholism, and his heavy drinking caused him to suffer from liver cirrhosis. As the Chicago area had a substantial Yugoslav immigrant population, Peter spent much of his exile in Chicago, where he maintained ties with anti-communist Serbian emigres, especially with the Serbian National Defense Council. The Non-Aligned Movement of the Third World nations, which had as one of its leaders Marshal Tito of Yugoslavia, was felt to be useful for American foreign policy in the Cold War as being disruptive to the Soviet bloc, creating the example of a communist regime in eastern Europe that was independent of the Soviet Union. The United States did not wish to push Tito towards the Kremlin by supporting the Serb royalist movement.