René Emilio Barrientos Ortuño

Barrientos was a native of Tarata, department of Cochabamba. His father was of Spanish ancestry while his mother was Quechua. After his father died when he was a child, Barrientos was sent to a Franciscan orphanage. He left the orphanage at 12 and attended a private high school while working odd jobs to pay the tuition. After graduating, he entered the military academy in La Paz. He was a career military officer, graduating from the military academy in 1943 and earning his pilot's license in 1945. Later in the 1940s, he gravitated toward the reformist Revolutionary Nationalist Movement (Movimiento Nacionalista Revolucionario, or MNR) party of Víctor Paz Estenssoro. Barrientos played a part in the Bolivian National Revolution of 1952, when the MNR toppled the established order and took power. In fact, he was given the task of flying out of the country to bring back the revolutionary leader Víctor Paz Estenssoro, then in exile, once the rebellion succeeded. In 1957, Barrientos was rewarded when he was named commander of the Bolivian Air Force.

While temporarily enhancing the president's stature, this only started more troubles for Barrientos. While the army was fighting the guerrillas, the miners of Siglo XX (a state-owned Bolivian mining town) declared themselves in support of the insurgency, prompting the president to send troops to regain control. This led to the San Juan massacre, when soldiers opened fire on the miners and killed around 30 men and women on Saint John's Day, called Día de San Juan in Spanish, 24 June 1967. Further, a major scandal erupted in 1968 when Barrientos' trusted friend and Minister of Interior, Antonio Arguedas, disappeared with the captured diary of Che Guevara, which soon surfaced in, of all places, Havana. From abroad, Arguedas confessed himself to have been a clandestine Marxist supporter, denouncing Barrientos and many of his aides as being on the CIA's payroll. The episode embarrassed the administration and cast doubts about the president's judgment (after all, it was he who was friends with, and had appointed, Arguedas to the most important ministry post in the government).

In the aftermath of the mining massacres and anti-guerrilla campaign, Barrientos was seen by some as a brutal dictator at the service of foreign interests while masquerading as a democrat. Eager to do some damage control and repair his once-excellent relations with the campesinos (Bolivian farm workers), the president took to traveling throughout the country to present his position, even to the smallest and remotest of Bolivian villages. It was a tactic that had yielded him good results in the past and Barrientos hoped to rebuild his political capital. However, on 27 April 1969, a Hiller OH-23 helicopter of the Bolivian Air Force (nicknamed Holofernes) that was carrying him struck telephone cables near Arque, killing Barrientos, his aide-de-camp and the pilot. An assassination has been considered a possibility but never proven.