United Self-Defenders of Colombia ( '' Autodefensas Unidas de Colombia '' , or AUC , in Spanish ) was a Colombian paramilitary and drug trafficking group which was an active belligerent in the Colombian armed conflict during the period from 1997 to 2006 . The AUC was responsible for retaliations against the FARC and ELN rebel groups as well as numerous attacks against civilians beginning in 1997 with the Mapiripán Massacre
Mapiripán Massacre
Mapiripán Massacre
United Self-Defense Forces of Colombia