Final answer:
World War I, known as 'the Great War' and 'the war to end all wars,' resulted in millions of casualties, utilizing advanced technology which marked it as the first mechanized and global conflict in history.
Step-by-step explanation:
World War I was also called “the Great War” and “the war to end all wars” because of the millions of casualties and the sheer brutal violence. The war brought forth a new degree of mechanized warfare with the introduction of tanks, airplanes, machine guns, and poison gas. It was the first global conflict, with profound economic, political, and social repercussions, deeply affecting the lives of millions across the world. The war's massive scale and comprehensive destructive impact earned it the characterization of being a total war, fought without restrictions on weapons or their targets, utilizing all available resources.