The First World War refers to the global conflict that took place between 1914 and 1918.

प्रथम विश्व युद्ध

English Usage: The First World War had a profound impact on the course of history.

Hindi Usage: प्रथम विश्व युद्ध का इतिहास के प्रवाह पर गहरा प्रभाव पड़ा।