After the split of
Los Zetas from the
Gulf Cartel in 2010, both the organizations started to fight each other for the control of the drug trade and the territories of the coast and for the border territories. From 2011 the
Los Zetas Cartel had
internal conflicts which are still ongoing that formed small rival factions, the most powerful faction is
Cártel del Noreste formed in 2014. From its creation, the organization started fighting the
Gulf Cartel and in the same time the other rival factions and other cartels. Doctor Coss is a rural community located 60 kilometers from the Mexican border town Miguel Alemán, which together with other neighboring communities is literally a battlefield between
Cártel del Noreste and
Gulf Cartel. As a precedent to the violence suffered in the municipality, was the murder of Francisco Leónides Cruz, secretary of public security of the municipality, on November 24, 2020. The attackers ambushed the police command with assault rifles, fired from vans with artisanal armor. In the attack, an officer died trying to repel the attack, and other unspecified people were injured. The former secretary had already been the target of an attack in May 2020, repelling an attack. In a study carried out by the Consejo Ciudadano para la Seguridad Pública y la Justicia Penal (Citizen Council for Public Security and Criminal Justice in Spanish), it was detailed that the proximity to the border municipalities causes the climate of violence, which according to the study made it the most violent municipality in Mexico with 1,691 per 100 thousand inhabitants (with only 1,360 inhabitants and 23 murders in 2021). ==The Battle==