They have been repeatedly displaced by fighting between the nation's largest guerrilla group, the Revolutionary Armed Forces of Colombia,or FARC, and a right-wing paramilitary group called the United Self-Defense Forces of Colombia.

VOA: standard.2009.03.22

Chavez's closeness to the Revolutionary Armed Forces of Colombia (FARC) is also an issue of contention.

CENTERFORSECURITYPOLICY: Venezuela requires a new type of thinking

Thus, his main ally is none other than the Colombian Revolutionary Armed Forces of Colombia (FARC).

CENTERFORSECURITYPOLICY: Center For Security Policy

Colombia's 1 March raid into Ecuador struck a Revolutionary Armed Forces of Colombia (Farc) camp located just across the border.

BBC: 'Ecuador incursion' into Colombia