WORLD HISTORY

Detailed explanation-1: -Serbia was angry at Austria-Hungary because they viewed the Austro-Hungarian annexation of Bosnia as a provocation, which it probably was. Serbia wished for greater power over the region even as they clashed with Austria, and from 1912 to1914 they indeed did just that.

Detailed explanation-2: -After Serbia was recognized as an independent state in 1878, both South Slavs and the Serbian government considered their peoples in Habsburg-ruled Austria-Hungary to be under occupation, resulting in increasing antagonism between Serbia and Austria-Hungary from the late 19th century to the early 20th century.

Detailed explanation-3: -On 23 July 1914 the Austro-Hungarian government issued Serbia with an ultimatum containing concrete demands in order to prevent an escalation. When the ultimatum is examined closely, it becomes clear that Vienna was concerned to make the demands as unacceptable as possible.

Detailed explanation-4: -The Austro-Hungarian ultimatum demanded that Serbia formally and publicly condemn the “dangerous propaganda” against Austria-Hungary, the ultimate aim of which, it claimed, is to “detach from the Monarchy territories belonging to it".

Detailed explanation-5: -Austria-Hungary was afraid of Serbia becoming too powerful. They interfered at the peace talks, resulting in Serbia gaining less territory than they thought they deserved. The Second Balkan War (1913) followed almost immediately when Bulgaria demanded more land.