Serb nationalism grows.
A Bosnian Serb student, Gavrilo Princip, assassinates the Austrian archduke Franz Ferdinand in Sarajevo. Bosnia-Hercegovina becomes part of the Kingdom of Serbs, Croats and Slovenes. A fascist Croatian puppet state is installed. Thousands of Bosnian Jews are sent to the death camps. 1990 - The collapse of communism leads to an upsurge in nationalism.