At the beginning of the 1960s, in Salisbury (now Harare), in Southern Rhodesia (now Zimbabwe), the government of Ian Smith hanged three black revolutionaries who had nevertheless been pardoned by the Queen of England. René Vautier, with ZAPU (Zimbabwe African Party for Unity), denounces this killing. Expelled by the Rhodesian police (informed by the French secret services), the filmmaker shoots a film in Algeria in the form of an indictment against colonial savagery. The film was first banned in France, then authorized in 1965.

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