Battles Without Honor and Humanity: Proxy War is a 1973 Japanese yakuza film directed by Kinji Fukasaku. It is the third film in a five-part series that Fukasaku made in a span of just two years, focusing on the events prior to a major war between Hiroshima yakuza in the early 1960s.

Kinji Fukasaku was a Japanese film director and screenwriter. Known for his "broad range and innovative filmmaking", Fukasaku worked in many different genres and styles, but was best known for his gritty yakuza films, typified by the Battles Without Honor and Humanity series (1973–1976). According to the Berkeley Art Museum and Pacific Film Archive, "his turbulent energy and at times extreme violence express a cynical critique of social conditions and genuine sympathy for those left out of Japan's postwar prosperity." He used a cinema verite-inspired shaky camera technique in many of his films from the early 1970s.