Dimitrov and Kalarov returned from Moscow, where they had been in exile since 1925, to assist the new government in its takeover.
His tenure in office was brief, and he was quickly succeeded by Dimitrov.
In 1942, on the initiative of Dimitrov, the Fatherland Front was established.
Thousands of Bulgarians were killed, and Dimitrov and Kalarov were exiled.
When Dimitrov took power, any opposition that remained was quickly eliminated.
A plebiscite held in September abolished the monarchy, declared Bulgaria a republic, and gave all power to Dimitrov as premier.