Why was world war 1 not like any other war when it occurred?

World War I was unprecedented due to its scale, involving many of the world's great powers and resulting in massive casualties, with an estimated 16 million deaths. It introduced modern warfare technologies, such as tanks, machine guns, and chemical weapons, leading to unprecedented levels of destruction and a stagnant trench warfare style. The war also significantly altered political landscapes, leading to the fall of empires and the rise of new ideologies, setting the stage for future conflicts. Additionally, the extensive use of Propaganda and total war strategies mobilized entire societies in ways that had never been seen before.