Shining Path of the center and south of Peru and had a large presence in the outskirts of Lima. As the organization grew in power, a cult of personality grew around Guzmán. The official ideology of the Shining Path ceased to be "Marxism–Leninism–Mao Tse-tung thought", and was instead referred to as "Marxism–Leninism–Maoism–Gonzalo thought". The Shining Path fought against Peru's other major guerrilla group, the Túpac Amaru Revolutionary Movement (MRTA), as well as campesino self-defense groups organized by the Peruvian armed forces. Although the reliability of reports regarding the Shining Path's atrocities remains a matter of controversy in Peru, the organization's use of
Shining Path Altos massacre, both of which were committed by Grupo Colina. After the collapse of the Fujimori government, interim President Valentín Paniagua established a Truth and Reconciliation Commission to investigate the conflict. The Commission found in its 2003 "Final Report" that 69,280 people died or disappeared between 1980 and 2000 as a result of the armed conflict. The Shining Path was found to be responsible for about 54% of the deaths and disappearances reported to the Commission. A statistical analysis of the available data led the Truth and Reconciliation Commission to estimate that the Shining Path was responsible for the death