Colombia’s Thousand Days’ War Begins

On October 17, 1899, rebel factions of Colombia's Liberal Party announced an armed insurrection against the governing National Party in the Department of Santander. Some accounts say the insurrection was meant to begin on October 20 and was brought forward by Liberal leaders such as Paulo Emilio Villar in Santander, even as other Liberal leaders hesitated because their forces lacked sufficient preparation and organization. This proclamation ignited what became the Thousand Days' War, Colombia's deadliest internal conflict. The war pitted Liberal rebels against the centralist state structure established under the Constitution of 1886 and the political movement known as the Regeneracion.

The broader conflict emerged from decades of ideological struggle across the nineteenth century, during which Colombia shifted between centralist unitary governance and federalist arrangements. The 1886 charter had curtailed the earlier federal system of the 1863 Constitution of Rionegro. However, central control failed to defuse economic friction and political estrangement between the regions. Liberal anger grew after the civil war of 1895 and the electoral fraud of 1897, which excluded Liberals from political participation, and the fall of world coffee prices deepened economic discontent. Although the insurrection was declared in mid-October and saw a river engagement on October 24, full-scale land hostilities began in earnest on November 11, 1899, when Liberal troops assaulted Bucaramanga.