The Columbian [sic] Crime Wars is a Timeline Event that can occur from 1955 to 1957.
While the event is happening, the commodity price of Tobacco increases by 25%, since foreign growers are busy fighting and destroying rival crops. On the plus side, this allows a third party uninvolved in the crime wars - like Tropico - to sell tobacco at a premium.
Colombia has an infamous history with narcotics and violent drug cartels. Criminal groups in the region have bitter rivalries with the others, which often lead to bloody conflicts and destruction. These wars often cause a spike in the cost of products made by the groups, since their attention is divided between making and selling the products and fighting with their enemies and destroying their goods.