As the biggest irregular guerrilla army in Colombia, the Revolutionary Armed Forces of Colombia (Fuerzas Armadas Revolucionarias de Colombia - FARC) operates in different regions of the country mainly in search for financial sources to fight their 40-year old war against the government and maintain their army. The Revolutionary Armed Forces of Colombia (Fuerzas Armadas Revolucionarias de Colombia - FARC) is the oldest and most important guerrilla group in Western Hemisphere. It has long financed its political and military battle against the Colombian government by kidnapping, extortion and participating on various levels in the drug trafficking business.