Conquering Self-Defense Forces of the Sierra Nevada (ACSN)

Force in Play

As of October 2026: 48-hour armed strike ended; heightened security remains in Santa Marta and Ciénaga

Colombian President Abelardo de la Espriella ordered the militarization of Santa Marta on September 22 after members of the Conquering Self-Defense Forces of the Sierra Nevada (ACSN) shot at shops and burned vehicles. The attacks were reprisals for a security operation that killed 13 group members, including a senior commander.

Updated Oct 6