What was World War I, and why did it change the world? In this video, we explain the key events, causes, and impact of World War I in a simple and engaging way for students and curious viewers. Learn about the assassination that sparked the war, the countries involved, trench warfare, and how the war finally came to an end. We also explore how WWI shaped the modern world and set the stage for future conflicts. Great for classroom use or anyone wanting a quick, clear overview of this major historical event.