Those who were arrested in Bosnia were tried in Sarajevo in October 1914.The other conspirators were arrested and tried before a Serbian court on the French-controlled Salonika Front in 1916–1917 on unrelated false charges; Serbia executed three of the top military conspirators.
The assassins received sporadic support from Serbia.
Much of what is known about the assassinations comes from these two trials and related records.
Under the 1878 Treaty of Berlin, Austria-Hungary received the mandate to occupy and administer the Ottoman Vilayet of Bosnia, while the Ottoman Empire retained official sovereignty.
On 15 June 1910, Bogdan Žerajić attempted to kill the iron-fisted Governor of Bosnia and Herzegovina, General Marijan Varešanin.
Žerajić was a 22-year-old Orthodox Serb from Nevesinje, Herzegovina, who was a student at the Faculty of Law at the University of Zagreb and made frequent trips to Belgrade.