[1] Bulgaria was in a precarious situation, still in the sphere of Nazi Germany's influence (as a former member of the Axis powers, with German troops in the country despite the declared Bulgarian neutrality 15 days earlier), but under threat of war with the leading military power of that time, the Soviet Union (the USSR had declared war on the Kingdom of Bulgaria 4 days earlier and units of its Third Russian Front of the Red Army had entered Bulgaria 3 days after), and with demonstrations, strikes, revolts in many cities and villages (6 – 7 September) and local government power taken by Bulgarian Fatherland Front (FF) forces (without Red Army help) in Varna, Burgas, etc.

On 26 August 1944, the government of Ivan Bagryanov had verbally declared Bulgaria's neutrality in the war under the threat of the Red Army's offensive in neighbouring Romania.

At the same time, the guerrilla actions of the partisans did not cease, the alliance with Nazi Germany was not disbanded and no attempts were made to normalize the relations with Moscow, forcing the Soviet Union to treat the new government with suspicion.

According to the plan, the coordinated actions of the partisans, the BWP combat groups and the pro-Fatherland Front army detachments would assume power and effective control of government during the night of 9 September.

Early in the morning, the new Prime Minister Kimon Georgiev informed the people on the radio of the shuffle: With the complete awareness that it is a true and full voice of the popular will, the Fatherland Front assumes in that fateful hour and difficult conditions the government of the country in order to save it from destruction.On 9 September, on the order of the NOVA commander-in-chief Dobri Terpeshev, all partisan units descended from the mountains and took over villages and cities' governments.

In Sofia, Plovdiv, the region of Pernik, Shumen and Haskovo the old regime's supporters were defeated by military action with the army coming under the effective control of the Fatherland Front.

The establishment of the new leadership happened at the latest in Haskovo, where partisans and other antifascists seized the artillery barracks on 12 September, but suffered many casualties, as the negotiations with the commanding officers failed to reach a compromise.

The Fatherland Front government included representatives of the BWP, BANU "Pladne", the Bulgarian Workers' Social Democratic Party (Wide Socialists) and Zveno.

After 9 September 1944, the Bulgarian Army joined the Third Ukrainian Front and contributed to the defeat of Nazism in Europe, helping drive out the Germans from much of Yugoslavia and Hungary, reaching as far as Klagenfurt in Austria by April 1945.