On June 28, 1914 in Sarajevo, Bosnia, Archduke Franz Ferdinand was assassinated by Gavrilo Princip, who was a part of a group in Serbia. A man named Franz Joseph did not want to war with Serbia, but the Vienna government did. So, Joseph had to give Serbia a harsh order to avoid the possibility of war. Since Serbia refused the demands, on July 28 Serbia and Austria-Hungary went to war.