This group was formed after the killing of regional indigenous leaders in Cauca by repressive forces of the state and large landowners .
This group received military training from the Marxist -- Leninist Communist Party ( PC - ML ) .
This group , which received military training from the Marxist -- Leninist Communist Party ( PC - ML ) , was formed after the killing of regional indigenous leaders in Cauca by repressive forces of the state and large landowners .