 Complete the following phrase:  In June 1923, when Prime Minister Aleksandar Stamboliyski was deposed through a coup détat, Dimitrov and Khristo Kabakchiev, the leading communists in Bulgaria at that time, resolved not to take sides, a decision condemned by Comintern as a political capitulation brought on by the partys dogmatic-doctrinaire approach. After Vasil Kolarov had been sent from Moscow to impose a change in the party line, Dimitrov accepted Cominterns authority, and in September 1923, he and Kolarov led the failed uprising, against the regime of against Aleksandar Tsankov, which cost the lives of possibly five thousand communist supporters during the fighting and the reprisals that followed. Despite its failure, the attempt was approved by Comintern, and secured the positions of Kolarov and Dimitrov - who escaped via Yugoslavia to Vienna - as the joint leaders of the Bulgarian CP. In the aftermath the 