His 1967 film
Shock Troops (
Un homme de trop) was entered into the
5th Moscow International Film Festival. In
Z (1969), an investigating judge, played by
Jean-Louis Trintignant, tries to uncover the truth about the murder of a prominent leftist politician, played by
Yves Montand, while government officials and the military attempt to cover up their roles. The film is a fictionalised account of the events surrounding the assassination of the Greek politician
Grigoris Lambrakis in 1963. It had additional resonance because, at the time of its release, Greece had been ruled for two years by
the "Regime of the Colonels".
Z won the
Oscar for
Best Foreign Language Film. Costa-Gavras and co-writer
Jorge Semprún won an
Edgar Award from the
Mystery Writers of America for Best Film Screenplay. ''
L'Aveu (The Confession'', 1970) follows the path of
Artur London, a Czechoslovak communist minister falsely arrested and tried for treason and espionage in the
Slánský 'show trial' in 1952.
State of Siege (1972) takes place in
Uruguay under the
civic-military dictatorship of Uruguay in the early 1970s. In a plot loosely based on the case of US police official and alleged torture expert
Dan Mitrione, an American embassy official (played by
Yves Montand) is kidnapped by the
Tupamaros, a radical leftist urban guerilla group, which interrogates him in order to reveal the details of secret American support for repressive regimes in
Latin America.
Missing, originally released in 1982 and based on the book
The Execution Of Charles Horman, concerns an American journalist,
Charles Horman (played by
John Shea in the film), who disappeared in the
1973 coup d'état led by General
Augusto Pinochet in
Chile. Horman's father, played by
Jack Lemmon, and wife, played by
Sissy Spacek, search in vain to determine his fate. Nathaniel Davis, US ambassador to Chile from 1971 to 1973, a version of whose character had been portrayed in the movie (under a different name), filed a US$150 million
libel suit,
Davis v. Costa-Gavras, 619 F. Supp. 1372 (1985), against the studio and the director, which was eventually dismissed. The film won an Oscar for
Best Screenplay Adaptation and the
Palme d'Or at the
Cannes Film Festival (with
Yılmaz Güney's movie
Yol).
Betrayed (1988) is roughly based upon the terrorist activities of American
neo-Nazi and
white supremacist Robert Mathews and his group
The Order. In
Music Box (1989), a respected
Hungarian immigrant (
Armin Mueller-Stahl) is accused of having commanded an
Anti-Semitic death squad during
World War II. His daughter, a Chicago defence attorney played by
Jessica Lange, agrees to defend him at his
denaturalization hearing. The film is inspired by the arrest and trial of Ukrainian immigrant
John Demjanjuk and screenwriter
Joe Eszterhas' realisation that his father had been a member of the Hungarian
Arrow Cross Party. The film won the
Golden Bear at the
40th Berlin International Film Festival.
La Petite Apocalypse (1993) was entered into the
43rd Berlin International Film Festival.
Amen. (2003), was based in part on the highly controversial 1963 play,
Der Stellvertreter. Ein christliches Trauerspiel (
The Deputy, a Christian Tragedy), by
Rolf Hochhuth. The film plot alleges that
Pope Pius XII was aware of the plight of the
Jews in Nazi
concentration camps during
World War II, but failed to take public action to publicise or condemn the Holocaust. Gavras won
César Award for Best Original Screenplay or Adaptation for this film. He was president of the
Cinémathèque Française from 1982 to 1987, and again since 2007. ==Political-commercial film==