The constituent groups of the OF had widely contrasting ideologies and had united only in the face of the pro-German militarist dictatorship in Bulgaria.

The OF government, headed by Kimon Georgiev of Zveno, signed a ceasefire treaty with the Soviet Union (28 October 1944).

In the summer of 1945 most of BANU led by Nikola Petkov and most of the Social-Democrats had left the OF and became a large opposition group which later on after the 1946 Grand National Assembly election would become a coalition named "Federation of the village and urban labour" with 99 MPs out of 465.

[2] In November 1946 Georgiev resigned as Prime Minister and was succeeded by Georgi Dimitrov, leader of the communists.

In 1948 and 1949 all the remaining parties in the OF save for the pro-communist wing of the BANU self-dissolved and merged into the BCP.