The provocation in that case was the assassination of a second-level figure, Archduke Franz Ferdinand, which then led the Austro-Hungarian emperor to issue an ultimatum to Serbia, they dragged in the various allies, within two months, all of Europe was at war.
Pemicunya saat itu adalah pembunuhan tokoh strata kedua, Archduke Franz Ferdinand, yang kemudian memimpin Kekaisaran Austro-Hungaria mengeluarkan ultimatum ke Serbia, mereka melibatkan banyak sekutu, Dalam waktu dua bulan, semua negara Eropa terlibat perang.