Pro-fascist monarchy overthrown
On August 26, 1944 the Nazi-allied Bulgarian government began the talks in Egypt with the USA and Britain, hoping for the dispatch of the US troops in Bulgaria as the Red Army was approaching Bulgarian borders.
On 5 September, the Soviet Union declared war on Bulgaria.
Therefore, on the same day the Bulgarian Workers’ Party called for an uprising and the seizure of political power as a primary task. The plan of uprising was developed on September 8th. It included coordination of general strikes, mutiny in the armed forces and the advance of the Bulgarian anti-fascist partisans from the Carpathian mountains.
Unrest began all around Bulgaria on 6 September and 7 September, with the strikes of the Pernik miners and the Sofia tram employees, as well as the general strikes in Plovdiv and Gabrovo. The prisons in Pleven, Varna and Sliven had their political prisoners released; 170 localities were entered by partisan detachments between 6 September and 8 September. In many cities and villages, the strikes and meetings grew into armed clashes with the police, with victims on both sides.
On the eve of 9 September, mutinying army units captured key locations in Sofia, such as the Ministry of War, the Ministry of Internal Affairs, the post, the telegraph, the radio, the railway station, etc. On the same day, all partisan units descended from the mountains and assumed power in the villages and cities.
On 10 September, the police was abolished and replaced with a popular militia consisting mainly of recent partisans; 8130 political prisoners were released from the prisons, and the concentration camps of the fascist regime were closed down. All Bulgarian fascist organizations were banned, as were their publications. The former monarchy regents, Prince Kyril, Bogdan Filov, and Nikola Mihailov Mihov, were executed. In the following referendum the monarchy was abolished.
– Dmytriy Kovalevich, slightly edited for grammaer