The German attack on the Soviet Union on 22 June 1941 sparked the rage of
Communists and
Russophiles in Bulgaria. The same day the BCP spread a brochure among the people urging them "to hinder by all means the usage of Bulgarian land and soldiers for the criminal purposes of German fascism". Two days later, on 24 June, the BCP called for an armed resistance against the Wehrmacht and the Bogdan Filov government. On 23 July 1941 an illegal radio station — "Hristo Botev" ("
Христо Ботев") — began broadcasting. In the first year of the resistance the BCP used mainly its . They carried out a number of actions, including arson and demolition of arms, clothes and fuel warehouses, communications, factories and transport lines. The combat groups assassinated prominent Bulgarian politicians, army and police leaders, and Wehrmacht officers. The combat groups' activities impaired the image of
Hitler's supporters in Bulgaria but a great number of their members were captured or killed. The first known
partisan in Bulgaria was
Ivan Kozarev. The first
guerrilla group (
cheta) was created on 26 June 1941 near
Razlog, the first partisan commander was
Nikola Parapunov. The second group was created in August 1941. Other guerrilla detachments were created in the late summer and autumn of 1941. The first guerrilla detachments were relatively small. They were created in the
Pirin,
Rhodopes and
Sredna gora mountains. In September 1941, Bulgarian communist
émigrés under the command of
Tsvyatko Radoinov and
Hristo Mihaylov arrived on Soviet submarines and aircraft to boost the
resistance movement. 55 experienced communist fighters were sent by the Foreign Bureau of the BCP, according to one version. According to another version, they were sent by order of the
NKVD, of which the Bulgarian Communists in
Moscow were not aware. The landing of the so-called "
paratroopers" and "
submariners" turned out to be precipitate and most of them were captured or killed. On the other hand, those who survived became some of the most prominent partisan leaders. On October 7, 1941, a second illegal radio station — "Naroden glas" ("
Народен глас") — began broadcasting. Also, activists of the Resistance produced and distributed several illegal newspapers ("
Работническо дело", "
Народен другар", "
Народен глас", "
Истина", "
Народен партизанин", "
Партизанска борба", "
Отечествен фронт") and
leaflets. ==Rise of the partisan force==