Final answer:
World War I was a global conflict from 1914 to 1918, involving major world powers and resulting in significant political, social, and military changes, including the introduction of industrialized warfare.
Step-by-step explanation:
World War I Overview
World War I, also known as The Great War, lasted from 1914 to 1918 and was the first industrialized global conflict. The principal members of the Allied Powers, originally known as the Triple Entente, included France, Great Britain, and Russia, with nations like Italy, Japan, and the United States joining later. Opposite them were the Central Powers comprising Germany, Austria-Hungary, the Ottoman Empire, and initially, Italy. This war introduced new levels of mechanization in warfare, including machine guns and mustard gas, leading to over 30 million casualties and changing the face of modern warfare.
World War I's impacts were profound, reshaping national boundaries and societies. It fueled changes that would lead to modernist movements in literature and art and set the stage for future geopolitical shifts.