 While Escobar's Medellin Cartel and the Cali Cartel would manufacture the products, Félix Gallardo's Guadalajara Cartel would oversee distribution.When enforcement efforts intensified in South Florida and the Caribbean, the Colombian organizations formed partnerships with the Mexico-based traffickers to transport cocaine by land through Mexico into the United States.This was easily accomplished because Mexico had long been a major source of heroin and cannabis, and drug traffickers from Mexico had already established an infrastructure that stood ready to serve the Colombia-based traffickers.