| La Violencia |
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| Prelude |
| Political parties |
| Presidents of Colombia |
Juan Roa Sierra (November 4, 1921 – April 9, 1948) was a Colombian known for assassinating Colombian Liberal leader and presidential candidate Jorge Eliécer Gaitán on April 9, 1948. After he shot Gaitán three times, mortally wounding him, a mob chased Roa Sierra down and killed him. The assassination of Gaitan triggered El Bogotazo, riots that partially destroyed Bogota and led to La Violencia, a period of violence that lasted until approximately 1958.
A fictinalized account of his final days was presented in the 2013 feature film Roa.