Colombian armed conflict origins remote to the beginning of twentieth century, and even after the 2016 peace agreement, it is a reality. Colombia's armed conflict existed by the force of the armed hand of the FARC and other insurgents’ groups, they financed themselves in illegal acts like arms and drug trafficking, abductions, coercion, and extortion. Till 2020, several FARC dissidents have returned to the guerrillas because they doubted Colombian political power to defense their interests. This paper's objective is to give a perspective of origins of the armed conflict in Colombia, and its development up to 2020. To expose the conflict, the facts and literature will be related demonstrating the conflict dynamic and involved actors. To support state-of-the-art during the 2016 peace agreement implementation, it was proceeded to interviews to some ex-observers that provided humanitarian support in the United Nations. In the end, it is possible to understand better the conflict, and it was made some reflections, which can contribute to possible solutions for the conflict.