Since 1982 there have been at least 2,000 massacres in Colombia committed by different illegal groups and by members of the Colombian army and police. The development of the conflict in Colombia has a direct relation with the causes and consequences of these crimes, perpetrated in most cases by paramilitary armies, associated to varying degrees with the cocaine trade. Paramilitary groups were a counterinsurgency force organized by the State, or independent, and supported economically by drug cartels and some landowners and businessmen.
Although guerrilla armies, insurgency, and communist groups created mostly in the 1960s perpetrated several massacres, these crimes were systematically used primarily by paramilitary groups to terrorize people in places where they had a particular interest, such as drug trafficking or vying for political power. In its book ¡Basta ya!, the Centro Nacional de Memoria Histórica has documented that 59% of the massacres were committed by paramilitary groups and 17% by guerrillas.
Rutas del Conflicto is a project created by journalists that marks the evolution of these groups through more than 30 years of war. Using mapping and timeline tools developed especially for the project, it has documented more than 700 of these crimes, displaying the degree to which the tragedy has affected the lives of millions of people in Colombia.