Siglo XX (Spanish for "Twentieth Century") is a tin mine in Bolivia. It is located in the city of Llallagua in the province of Bustillos, Potosi Department. Along with the Catavi mine, it is part of a mining complex in the area.
It was acquired in the 1910s by Simon Iturri Patino, who was dubbed the "King of Tin." It was the site of continual labor strife, and many of its workers were active in the Union Federation of Bolivian Mine Workers (FSTMB).
The mine was nationalized following the "Bolivian National Revolution" of 1952, when the Revolutionary Nationalist Movement (MNR) and its allies overthrew the military junta. Siglo XX and other mines were placed under the control of a new state agency, the Corporacion Minera de Bolivia (COMIBOL). The Catavi-Siglo XX complex became the largest component of COMIBOL.
On June 24, 1967, government troops under the orders of General Rene Barrientos and a new military junta marched on the mine and committed the largest massacre of workers in Bolivian history.
In 1987, as part of an economic restructuring deal with the IMF and World Bank, the government shut down production at Siglo XX.
Jordan Pozo, Rolando: Mineria. Siglo XX: la era del estano; in: Campero Prudencio, Fernando: Bolivia en el siglo XX. La formacion de la Bolivia Contemporanea, La Paz: Harvard club de Bolivia 1999, S. 219-239
Principales minas de estano, Bolivia (span.)
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