Answer
The AUC is an acronym for Autodefensas Unidas de Colombia, which means United Self-Defense Forces of Colombia in English. The AUC was a right-wing paramilitary group that was responsible for many human rights abuses, including torture, forced disappearances, and extrajudicial killings. Uribe controversially demobilized the AUC in 2006, but many human rights activists believe that the group still exists in an underground form.