The Washington has levied restrictions on a group of four people and four firms alleged of hiring South American contractors to support and educate a armed faction in Sudan that Washington accuses of genocidal acts.
Disclosing the measures on this week, the Treasury stated the network was largely composed of individuals and businesses from Colombia.
Scores of former Colombian military personnel have allegedly journeyed to the conflict in Sudan to combat beside the RSF paramilitary group, a faction linked to terrible atrocities such as massacres based on ethnicity and mass abductions.
The involvement of Colombian fighters initially emerged in 2024, prompted by an investigation which found that hundreds of retired troops had been contracted to engage in combat – an discovery that led to an unprecedented apology from the Colombian government.
These South American veterans have widely regarded as among the world’s most sought-after mercenaries due to their vast combat experience resulting from years of internal conflict, training on Nato equipment, and superior tactical education.
In Sudan, the contractors have been accused of teaching child soldiers, provided drone warfare training, and engaged in frontline combat. One source remarked that training children was "terrible and insane" but added that "regrettably, war operates that way".
Among those sanctioned was Álvaro Andrés Quijano Becerra, a dual Colombian-Italian national and ex-soldier based in the Dubai. The government accused him a key part in recruiting and deploying former Colombian soldiers to Sudan. His wife, Claudia Oliveros, was also sanctioned.
Also on the penalty list was Mateo Andrés Duque Botero, a dual Colombian-Spanish citizen who authorities say ran a firm linked to managing finances and payments for the network. "Over the past two years, companies in the United States linked to Duque carried out multiple financial transactions, worth millions," the government release said.
Colombian national Mónica Muñoz was the fourth individual to be sanctioned, with the company she managed accused of wire transfers linked to Duque and his businesses.
"The US once more urges foreign parties to cease providing financial and military support to the belligerents," the Treasury stated.
A senior analyst, senior analyst at the International Crisis Group, described the measures as a "major" development, saying that "calling out those who are doing the contracting is the right way to go".
She added that, Bogotá has enacted a law approving the anti-mercenary convention, designed to limit years of participation by its nationals in overseas wars and reshape national security policy.
Another expert, an expert on mercenaries, called for greater wariness, saying that "penalties are required yet incomplete for combating rampant mercenarism".
"It operates in the black market and operating from the Emirates, which is difficult to penalize," he said. The United Arab Emirates has been frequently alleged of arming the RSF, claims it rejects. "Expect more Colombian mercenaries," McFate warned.