April 1984 - Antidrug Justice Minister Rodrigo Lara is assassinated.
December 1986 - Guillermo Cano, publisher of El Espectador, Bog'ota newspaper that led antidrug campaign, is murdered. President Belisario Bentancur Cuartas declares a state of siege.
February 1987 - Carlos Lehder Rivas becomes the first and only Medell'in cartel founder to be captured and extradited to the United States.
June 1987 - Colombia's Supreme Court declares unconstitutional the extradition of Colombians to the US.
August 1989 - Luis Carlos Galan, presidential candidate with hard-line antidrug stance is killed. President Virgilio Barco Vargas announces confiscation of traffickers' property and resumption of extradition.
Aug. 24, 1989 - The ``extraditables'' - a name chosen by the Medell'in cartel - declare war on government. Bombings, murders ensue.
December 1989 - Jos'e Gonzalo Rodr'iguez Gacha, a key Medell'in drug lord, is killed in police raid.
May 1990 - Medell'in cartel declares an end to bombings. Campaign of police killings begins. Hundreds of officers are killed in three months.
May 1990 - C'esar Gaviria Trujillo wins presidency.
September 1990 - President Gaviria offers leniency and no extradition to traffickers who surrender and confess.
December 1990 - Medell'in cartel's number two man, Fabio Ochoa V'asquez surrenders.
May 1991 - Priest, who spoke to Medell'in cartel leader Pablo Escobar, says Mr. Escobar will turn himself in soon.