Question

Which event directly led to beginning of world war z

Answer 1

Although the origin of the zombie pandemic is unknown, the story begins in China after an unknown creature bites a young boy (who becomes the official Patient Zero). The Chinese government attempts to contain the infection and concocts a crisis involving Taiwan to mask their activities.

FYI: I am talking about the movie

Answer 2

what actually started the war was the assasination of Archduke Franz Ferdinand.