The nationalization of the Chilean copper industry, commonly described as the Chileanization of copper (Spanish: Chilenización del cobre) was the process by which the Chilean government acquired control of the major foreign-owned section of the Chilean copper mining industry. It involved the three huge mines known as 'La Gran Mineria' and three smaller operations. The Chilean-owned smaller copper mines were not affected. The process started under the government of President Carlos Ibáñez del Campo, and culminated during the government of President Salvador Allende, who completed the nationalization. This "act of sovereignty" was the espoused basis for a later international economic boycott, which further isolated Chile from the world economy, worsening the state of political polarization that led to the 1973 Chilean coup d'état.