5 h 16 m, 23 jul 1914 ano - Austria-Hungary delivers ultimatum to Serbia
Descrição:
 - Austria-Hungary, backed by their ally, 
  Germany, delivered an ultimatum to Serbia
- although Serbia offered to submit to 
  arbitration, they began to mobilize their army 
Adicionado na linha do tempo:
Data:
5 h 16 m, 23 jul 1914 ano
Agora
 ~ 111 years ago