The US government has officially designated the Gulf Clan, the nation's largest and most powerful illegal armed group, as a foreign terrorist organization.
This notorious narcotics-smuggling militia, with roots in right-wing paramilitary forces, operates in at least 20 of Colombia's provinces.
It controls key human and narcotics trafficking routes through the treacherous Darién Gap and has fought leftist rebels for control of illicit operations along the shared border.
In recent years, the group has sought to rebrand itself as a political movement, akin to other Colombian insurgent factions.
This strategy could secure it more favorable conditions in any potential peace talks. However, it is not widely considered to have tangible political aims.
In a recent announcement, the US top diplomat described the Gulf Clan—which calls itself the Gaitanist Self-Defense Forces of Colombia (AGC)—as a "violent and powerful criminal organisation."
He stated it has "thousands of members" and that its "primary source of income is cocaine trafficking, which it uses to fund its violent activities."
While other Colombian criminal groups have been listed as terror entities before, this decision is the first under the current administration.
This administration has previously targeted six cartels in Mexico and two in Venezuela.
The move is expected to heighten tensions between the US and Colombia's president, who strongly opposes the US pressure campaign against Venezuela.
This includes lethal military strikes on vessels that have reportedly killed scores of people in Pacific and Caribbean waters.
The two leaders have traded public barbs for several weeks. After implying that any narcotics-producing country was a possible focus, the US president specifically mentioned Colombia, stating the Colombian leader "will face himself some big problems if he doesn't change course."
The Colombian president responded by cautioning his US counterpart to "avoid provoking a strong response" with threats of military action.
The US has used its so-called anti-narcotics campaign to justify the strikes on boats it alleges are transporting illicit cargo.
The Colombian president has described these attacks as "unlawful killing." Early on Tuesday, the US military stated it had conducted further attacks on three vessels near Colombia's Pacific coast, resulting in eight fatalities.
Other Colombian criminal organisations have been on the US terror list for a long time.
Some authorities in Colombia had believed the Gulf Clan might be crippled by the capture and extradition of its main leader to the US in 2022.
Instead, the group initiated a campaign of terror, killing police officers and local leaders and keeping vast areas of the country in a state of fear.
The Gulf Clan is now engaged in halting talks with the government. It is seen as the primary barrier to the president's struggling "comprehensive peace" plan, which aims to end the country's many-sided armed conflict.
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