One hundred years ago, World War I began when the Austro-Hungarian Empire invaded Serbia in retaliation for the assassination of Archduke Franz Ferdinand on June 28. In a matter of weeks, Germany invaded France and neutral Luxembourg and Belgium, Austria-Hungary and Russia attacked each other, and Russia invaded Germany.
Both sides believed the war would be over by the end of the year, but, of course, it lasted for another four years. By its end, some 16 million people had been killed and the maps of Europe and the Middle East were redrawn. Sadly, because of the short-sightedness of the victors, the settlement of the war sowed the seeds for World War II, an even deadlier, ghastlier war, and the redrawn borders didn't usually take ethnic and religious differences into account, setting the stage for many conflicts that continue to rage today.