Answer:
The military action that initiated WWI was the assassination of Archduke Franz Ferdinand, the heir to the Austro-Hungarian Empire, on June 28, 1914, in Sarajevo, Bosnia. The assassination was carried out by a group of Bosnian Serb nationalists who wanted to unite Bosnia with Serbia. Get well-researched essays from proffrank01[at]gm ail. c om. Guaranteed quality always.
The Austro-Hungarian Empire thought the assassination challenged their authority in the Balkans. Consequently, they demanded that Serbia take responsibility for the assassination and punish those responsible. When Serbia refused to comply with all of the demands, Austria-Hungary declared war on Serbia on July 28, 1914.
The war quickly escalated, drawing other nations into the conflict through pre-existing alliances and treaties. Germany, Austria-Hungary's ally, declared war on Russia and France, while Britain declared war on Germany. The conflict spread across Europe and beyond, eventually involving over 30 countries and becoming the first truly global war in history.
Overall, the assassination of Archduke Franz Ferdinand ignited tensions and rivalries that had been building in Europe for decades, leading to the outbreak of WWI.
Step-by-step explanation: