World War I Begins and Ends on the Same Date in History: June 28

The assassination of Archduke Franz Ferdinand by Gavrilo Princip on June 28, 1914, in Sarajevo, ignited World War I. Princip, a 20-year-old Bosnian Serb and member of the revolutionary movement Mlada Bosna and the secret society Black Hand, was part of a larger conspiracy targeting the Archduke and his entourage.

The ensuing political turmoil rapidly escalated into a continental war, resulting in approximately 10 million deaths. The conflict concluded with the defeat of Germany and its allies, leading to the abdication of Kaiser Wilhelm II and the end of the German Empire. The Austro-Hungarian and Ottoman empires also dissolved in the war's aftermath.

The Treaty of Versailles, signed on June 28, 1919, formalized the war's end. The victorious Allied powers dictated terms to Germany, largely decided in secret negotiations among France, Great Britain, and the United States. Many Germans, including Adolf Hitler, viewed these reparations and restrictions as humiliating. Historians argue that the treaty's terms were a significant factor in Germany's embrace of totalitarian nationalism in the 1930s.