Léonie Duquet was a French nun who was arrested in December 1977 in Buenos Aires, Argentina, and "disappeared". She was believed killed by the military regime of Argentine President Jorge Rafael Videla during the Dirty War. Alice Domon, a French nun working with Duquet, disappeared a few days later. They had been working in poor neighborhoods of Buenos Aires in the 1970s and supported the Mothers of the Plaza de Mayo, founded in 1977. Despite repeated efforts by France to trace the sisters, the Argentine military dictatorship was unresponsive. In 1990 a French court in Paris tried Argentine Captain Alfredo Astiz, known to have arrested Duquet and believed implicated in the "disappearance" of Domon, for kidnapping the two sisters. He was convicted and sentenced to life imprisonment in absentia. In Argentina at the time, he and other military and security officers were shielded from prosecution by Pardon Laws passed in 1986 and 1987. These were repealed in 2003 and ruled unconstitutional in 2005, and the government re-opened prosecution of war crimes.

Jorge Rafael Videla was an Argentine military officer and dictator who was the 47th President of Argentina and as well as the 1st President of the National Reorganisation Process from 1976 to 1981. His rule, which was during the time of Operation Condor, was among the most infamous in Latin America during the Cold War due to its high level of human rights abuses and severe economic mismanagement.