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The beginning of conflict
The assassination of Archduke Franz Ferdinand of Austria-Hungary. A Serbian-nationalist terrorist group called the Black Hand sent groups to assassinate the Archduke. -
Russia's response
Russia deploys its army to intervene against Austria-Hungary in favor of its ally, Serbia. This move starts a chain reaction that leads to the deployment of the rest of the European Powers. inevitably that leads to nations being hostile towards one another. -
World War 1 officially starts
The country of Germany decides to invade Belgium officially starting WW1