Tuhia he tomokanga mō tēnei wāhanga - Ko te kohurutanga o Archduke Franz Ferdinand o Austria i te 28 o Pipiri 1914 i Sarajevo e Gavrilo Princip, he mema o te whakahaere Young Bosnia, i arahina ki a Austria-Hungary ki te whakapuaki i te pakanga ki Serbia, i te 28 o Hōngongoi 1914. I piki ake te pakanga ā-rohe i te wā i whakapuaki a Tiamana i te pakanga ki a Rūhia, i whakaekea hoki a Wīwī me Belgium, nā reira i kukume ai a Piritene ki roto i te pakanga i riro ai hei Pakanga Tuatahi o te Ao. I wikitoria a Serbia i nga pakanga nui tuatahi o te Pakanga Tuatahi o te Ao, tae atu ki te Pakanga o Cer, me te Pakanga o Kolubara
, e tohu ana i ngā wikitoria tuatahi o te Rōpū Taua ki ngā Mana Matua i te Pakanga Tuatahi o te Ao.