World War I, fought between 1914 and 1918, was a global conflict that changed the course of history. Triggered by the assassination of Archduke Franz Ferdinand of Austria, this war involved many countries in Europe and eventually spread throughout the world. One of the most striking aspects of this war was the use of advanced military technology for that time, including tanks, fighter planes, and chemical weapons. The battles at Verdun and the Somme became symbols of the cruelty and mass death that occurred on the battlefield. This conflict introduced new warfare tactics, such as trench warfare, which led to stasis on many fronts. Soldiers had to face inhumane conditions, including extreme weather, food shortages, and disease. The geostrategic shift caused by this war gave birth to new powers and marked the fall of several great empires, such as the Austro-Hungarian, Ottoman, and Russian Empires. Meanwhile, the peace agreement at Versailles in 1919 had long-term impacts. This treaty not only punished Germany, but also created discontent that gave rise to future conflict. New countries were formed, and the map of Europe was remodeled, leading to continued ethnic tensions in various regions. World War I also influenced art and culture at that time. Many artists, writers, and musicians describe their experiences through works that reflect grief and loss. Art movements such as Dadaism emerged as a reaction to the absurdity of war. From a social perspective, women began to fill the positions left by men who went to war. This sparked stronger voting rights and gender equality movements in the following decades. Women’s involvement in industry and service during the war represented a significant change in society’s view of women’s roles. In the history of education, World War I is an important case study of conflict, strategy, and diplomacy. Many universities around the world are adding courses related to the history of the war to analyze and understand the lessons that can be learned from this tragedy. As time passes, the memory of World War I lives on through monuments, museums, and memorial ceremonies. Future generations are encouraged to value peace and prevent the repetition of this dark history. A complex legacy, World War I remains a topic of discussion and research. Efforts to study its causes and consequences over more than a century demonstrate the resilience of societies in the face of the unimaginable consequences of war.