The Christian Democratic Union (CDU) political party dominated West German governments from 1949 to 1969. These governments refused to have any contact with the GDR government due to its undemocratic character, and the Hallstein Doctrine stipulated that the FRG would withdraw diplomatic contact from any country that established diplomatic relations with the GDR. The first application of the Hallstein Doctrine was in 1957, when the FRG withdrew recognition of Yugoslavia after it accepted a GDR ambassador.