The Edwardian and World War I Periods (1900-1920) are named after important political events. King Edward VII of England, who became king in 1901 after the lengthy reign of his mother, Queen Victoria, gave his name to the Edwardian era. The World War I era refers to the years before, during and after the Great War. The war had a major effect on fashion in fabric restrictions, style changes due to women taking over men’s jobs while they were away at war, and the adoption of some clothing styles such as sweaters and trench coats that were worn by the military.