The Mexican Dirty War (Spanish: Guerra sucia) was the Mexican theater of the Cold War, an internal conflict from the 1960s to the 1980s between the Mexican Institutional Revolutionary Party (PRI)-ruled government under the presidencies of Gustavo Díaz Ordaz, Luis Echeverría, and José López Portillo, which were backed by the U.S. government, and left-wing student and guerrilla groups. During the war, government forces carried out disappearances (estimated at 1,200), systematic torture, and "probable extrajudicial executions".
In the 1960s and 1970s, Mexico was persuaded to be part of both Operation Intercept and Operation Condor, developed between 1975 and 1978, with the pretext to fight against the cultivation of opium and marijuana in the "Golden Triangle", particularly in Sinaloa. The operation, commanded by General José Hernández Toledo, was a flop with no major drug-lord captures, but many abuses and acts of repression were committed.