On December 2, 1980, four Catholic missionaries from the United States working in El Salvador were raped and murdered by five members of the El Salvador National Guard. They were Maryknoll Sisters Maura Clarke and Ita Ford, Ursuline Dorothy Kazel, and lay missionary Jean Donovan.
The Salvadoran Civil War began after a 1979 military coup brought the Revolutionary Government Junta to power. Catholic activists protested against the junta's oppression of impoverished citizens. Óscar Romero, the Archbishop of San Salvador, was assassinated on March 24, 1980, while saying Mass. The four murdered Americans were involved in an international humanitarian aid mission which was suspected by the régime of fomenting political opposition.
Kazel and Donovan, who were based in La Libertad, drove to El Salvador International Airport on the afternoon of December 2 to pick up two Maryknoll Sisters returning from a Maryknoll conference in Managua, Nicaragua. Kazel and Donovan were under surveillance by a National Guardsman at the time, who phoned his commander. Acting on orders from the commander, five National Guardsmen changed out of uniform and continued to stake out the airport. Donovan and Kazel returned to pick up Clarke and Ford, who were returning from the same conference, on a flight due at 7:00 pm, which landed at 9:11 pm. The five Guardsmen stopped the four women's vehicle after they left the airport. They were taken to a relatively isolated spot where they were beaten, raped and murdered by the soldiers.