El Mencho, also known as Nemesio Rubén Oseguera Cervantes, was the co-founder and leader of the Jalisco New Generation Cartel (CJNG), which has emerged as one of Mexico's most powerful and violent criminal organizations. His role in the cartel was marked by extreme violence and a military-style approach to conflict, including the use of drones for dropping explosives and conducting high-profile attacks on military targets. The CJNG, although not as globally recognized as the Sinaloa cartel led by Joaquín 'El Chapo' Guzmán, has gained infamy within Mexico for its brutality. The cartel's tactics have included direct assaults on the military, with notable incidents such as shooting down an army helicopter in a failed capture attempt of El Mencho in 2015, demonstrating their willingness to engage in warfare against state forces. El Mencho's death is being seen as a pivotal moment in Mexico's ongoing conflict with drug cartels, potentially altering the power dynamics within organized crime in the region. His leadership set a precedent for escalating violence in the drug trade, and his removal could lead to a struggle for power among rival factions within the CJNG and other cartels, impacting the overall security situation in Mexico.