Kill or Be Killed is an 18 minute long, documentary-style film directed in 1942 by experimental New Zealand artist Len Lye during his time working for the British Government's Ministry of Information. The initial purpose of the film was to serve as a military training tool and a piece of post-war propaganda viewable by the general public, but since its release, both critics and filmmakers alike have hailed it as a “masterpiece of filmmaking,” claiming that the realistic cinematography is both pleasing in aesthetics and technicality for its time. The film is most notable for its use of subjective viewing.