US military-led task force assists Mexico in capturing 'El Mencho' cartel leader

The US-led task force supported Mexican forces in a key operation that killed Nemesio Oseguera known as El Mencho leader of the powerful CJNG cartel marking a major step in efforts to combat drug trafficking and cartel networks along the US Mexico border

A recently created U.S. military-led task force specializing in intelligence on drug cartels played a supportive role in a Mexican military operation on Sunday that resulted in the death of Nemesio Oseguera, widely known as 'El Mencho,' a leading Mexican drug trafficker, according to a U.S. defense official who requested anonymity.

Joint Interagency Task Force-Counter Cartel

The Joint Interagency Task Force-Counter Cartel (JITF-CC) was officially established last month, integrating multiple U.S. government agencies. Its main mission is to track and map the networks of cartel members operating along the U.S.-Mexico border. U.S. officials clarified that the operation itself was carried out exclusively by Mexican military forces. An anonymous former U.S. official stated that the United States provided a comprehensive intelligence dossier on El Mencho to Mexican authorities. This information was collected from U.S. law enforcement and intelligence services. The former official emphasized that El Mencho was one of the highest-priority targets for U.S. authorities in Mexico.

The Mexican Operation

Mexican forces killed Oseguera, 59, during a military operation aimed at apprehending him in the western state of Jalisco. The raid triggered significant unrest, including burning vehicles and armed blockades across highways in more than six Mexican states. Mexico's Defense Ministry confirmed that U.S. authorities supplied "complementary information" but did not specify the scope of assistance. Sources familiar with the operation underlined that the mission was entirely planned and executed by Mexico, with no U.S. military personnel participating directly on the ground.

'El Mencho' and the CJNG

Nemesio Oseguera, a former police officer, led the Jalisco New Generation Cartel (CJNG), considered one of the most powerful criminal organizations in Mexico. Despite a $15 million U.S. reward for information leading to his capture, he avoided law enforcement for several years. His death marks a major development in Mexico’s ongoing campaign against drug trafficking, which funnels billions of dollars’ worth of cocaine and fentanyl into the United States. The operation occurred amid heightened U.S. pressure on Mexican authorities, with the previous U.S. administration urging intensified anti-cartel measures and warning of potential direct intervention if necessary.

U.S. Strategy and Task Force Role

The JITF-CC operates largely out of public view. Its stated mission is to identify, disrupt, and dismantle cartel activities that threaten the United States along the border. Brigadier General Maurizio Calabrese, head of the task force, explained that U.S. military experience in countering organizations such as al Qaeda and ISIS is being adapted to analyze cartel structures. Cartel operations differ in motives and organization, making comprehensive mapping of networks essential for effective disruption. Estimates indicate that a few hundred core cartel members occupy top-level positions, while roughly 200,000 to 250,000 independent contractors assist in drug transportation and distribution. Former DEA official Jack Riley noted that designating Mexican cartels as terrorist organizations allowed greater U.S. military support, particularly in intelligence, surveillance, and reconnaissance. Cartels, however, remain adept at concealing their leadership and operational locations.

Broader U.S. Efforts Against Drug Trafficking

A second U.S. defense official indicated that the task force is part of a larger strategy in which the U.S. military increasingly participates in border operations. This includes regular U.S. strikes on suspected drug-carrying vessels in the Caribbean and Pacific, raising legal discussions among lawmakers and experts. The official emphasized that the interagency task force aims to unify efforts, prevent fragmented operations, and coordinate intelligence and operational planning to improve effectiveness against cartel networks.

Conclusion

The death of 'El Mencho' represents a significant milestone in Mexico’s effort to dismantle organized crime and reduce the flow of illicit drugs into the United States. The cooperation between Mexican authorities and the newly formed U.S. Joint Interagency Task Force-Counter Cartel reflects a strategic shift toward intelligence-based operations targeting cartel leadership and networks on both sides of the border.

Sources:

• New US military-led group aided Mexico's hunt for 'El Mencho' cartel boss — Reuters
• Mexico forces kill 'El Mencho' after US help: Violence hits multiple states — Axios
• What to Know About the Operation to Kill Mexican Drug Lord 'El Mencho' — Time
• New US military-led group aided Mexico's hunt for 'El Mencho' cartel boss