Johnny Got His Gun is an anti-war novel written in 1938 by American novelist Dalton Trumbo and published in September 1939 by J. B. Lippincott. The novel won one of the early National Book Awards: the Most Original Book of 1939. A 1971 film adaptation was written and directed by Trumbo.

An anti-war movement is a social movement, usually in opposition to a particular nation's decision to start or carry on an armed conflict. The term anti-war can also refer to pacifism, which is the opposition to all use of military force during conflicts, or to anti-war books, paintings, and other works of art. Some activists distinguish between anti-war movements and peace movements. Anti-war activists work through protest and other grassroots means to attempt to pressure a government to put an end to a particular war or conflict or to prevent it in advance.