The Bulgarian Resistance was part of the anti-Axis resistance during World War II. It consisted of armed and unarmed actions of resistance groups against the Wehrmacht forces in Bulgaria and the Kingdom of Bulgaria authorities. It was mainly communist and pro-Soviet Union. Participants in the armed resistance were called partizanin (a partisan) and yatak (a helper, or a supporter, someone who provides cover for someone else).
The Communists had long despised the pro-German policy of Prime Minister Bogdan Filov and even campaigned in 1940 for a political pact with Moscow (the Sobolev action).
German forces entered Bulgaria on 1–2 March 1941 as a result of Bulgaria's adhesion to the Axis. The Bulgarian Communist Party (BCP) declared this to be a "fatal move" and once again called for a union with the USSR.
On 6 March 1941 Georgi Dimitrov called on the people of Bulgaria to start resistance against the Germans.
Before the German invasion of the USSR, there had not been any armed resistance in Bulgaria. At the start of World War II, the Comintern supported a policy of non-intervention, arguing that the war was an imperialist war between various national ruling classes, but when the Soviet Union itself was invaded on 22 June 1941, the Comintern changed its position. The resistance movement was set up in August 1941 by the Bulgarian Communist Party to oppose the pro-Nazi government.