The Deer Hunter is a 1978 American epic war drama film co-written and directed by Michael Cimino about a trio of Slavic-American steelworkers whose lives are upended after fighting in the Vietnam War. The three soldiers are played by Robert De Niro, Christopher Walken and John Savage, with John Cazale, Meryl Streep and George Dzundza in supporting roles. The story takes place in Clairton, Pennsylvania, a working-class town on the Monongahela River south of Pittsburgh, and in Vietnam.

War film is a film genre concerned with warfare, typically about naval, air, or land battles, with combat scenes central to the drama. It has been strongly associated with the 20th century. The fateful nature of battle scenes means that war films often end with them. Themes explored include combat, survival and escape, camaraderie between soldiers, sacrifice, the futility and inhumanity of battle, the effects of war on society, and the moral and human issues raised by war. War films are often categorized by their milieu, such as the Korean War; the most popular subjects are the Second World War and the American Civil War. The stories told may be fiction, historical drama, or biographical. Critics have noted similarities between the Western and the war film.