First World War
From Longman Dictionary of Contemporary EnglishFirst World WarˌFirst World ˈWar noun → the First World WarExamples from the CorpusFirst World War• The political or governmental phase largely began after the First World War.• After the First World War Binding rejoined the family business.• In the old days before the First World War, Papa had traded in the walnut veneer business.• Employers constantly gnawed at the high level of wages which had been built up during the First World War.• It was taking time for Britain to recover from the First World War.• It was the First World War because it affected most of the people of the world.