On August 18, 1956 BDS held its last plenary meeting. That meeting paved the way for the merger of BDS with the Senegalese Democratic Union (UDS), Casamance Autonomist Movement (MAC) and a fraction of the Senegalese Popular Movement (MPS) led by Abdolaye Thiaw. The result of the merger was the creation of the Senegalese Popular Bloc (BPS).