The Guadalajara Cartel was a powerful drug trafficking organization in Mexico during the late 1970s and 1980s. It was primarily involved in the production and distribution of marijuana and cocaine. The cartel was known for its connections to various drug lords, including Miguel Ángel Félix Gallardo, who played a significant role in its operations. The cartel's influence extended across Mexico and into the United States, where it established extensive smuggling routes. However, internal conflicts and law enforcement efforts led to its decline in the late 1980s, ultimately resulting in its fragmentation into smaller groups, such as the Sinaloa Cartel.