Look up First World War in Wiktionary, the free dictionary.
The First World War was a global conflict lasting from 1914 to 1918.
The First World War may also refer to:
- The First World War (TV series), a 2003 documentary series
- The First World War (wargame), a 1977 board wargame
- The First World War, a 1960 military history book by Cyril Falls