All was peaceful in Europe until-

Serbia: Assassinates Austrian Archduke Franz Ferdinand and his wife

Austria-Hungary: H-HEY!! Declares war with Serbia

German Empire: Transforms into the Reichtangle and declares war with Serbia as well

France and Russia: Declares war on Germany and Austria-Hungary

Bulgaria: Joins the side of the Central Powers

UK: Sips tea. Looks over What the bloody hell is going on!?

France: Germany and Austria-Hungary declared war on Serbia!

UK: Bloody hell! Declares war against the Central Powers

Ottoman Empire: Joins the Central Powers in the war

Meanwhile

USA: Watching from North America Yup, definitely not getting involved-