During his time in Užice, he met Dimitrije Tucović, Radovan Dragović and Dragiša Lapčević, the founders of socialism in Serbia and started on the path of a life-long socialist.
During the party's congress in Vukovar, Topalović argued that the situation in Yugoslavia was not revolutionary and that the principles of the Second International should not be followed.
[10][11] During this congress Topalović proposed that Bosnia should be fourth federal unit, besides Serbia, Croatia and Slovenia, but this was opposed by Dragiša Vasić and Stevan Moljević.
[12] On the last day of the Ba Congress, Topalović presented his work against Yugoslav Partisans, which was made in reaction to the Second AVNOJ meeting.
[13] In the village of Trbušani near Čačak in the end of April 1944, Topalović alongside Miroslav Trifunović and Predrag Raković met with Milan Aćimović and representative of Hermann Neubacher, Nazi delegate for Southeastern Europe.
[14] On 31 May 1944, Topalović left for Italy with his wife alongside Charles Armstrong, British officer on liaison mission to Chetniks.
[15] Topalović praised Chetniks and attacked Partisans in a report, advising allies to rely on Mihalović.