During the attack by Chetniks on Axis forces in Tuzla in December 1944, Keserović commanded the right column of the Chetnik forces, while the left column was commanded by Mihailović. In late 1944, Keserović released a captured member of the enemy forces whose name was Alija Izetbegović (who would in 1996 became the first President of Bosnia and Herzegovina), based on intervention by a group of Serbs who informed him that Izetbegović's grandfather had saved the lives of 40 Serbs in 1914 during an anti-Serb pogrom that followed the Assassination of Archduke Franz Ferdinand.