 As of December 2016, two subgroups calling themselves Los Zetas Grupo Bravo (Group Bravo) and Zetas Vieja Escuela (Old School Zetas) formed an alliance with the Gulf Cartel against a group known as El Cartel del Noreste (The Cartel of the Northeast).La Familia Michoacana was a major Mexican drug cartel based in Michoacán between at least 2006 and 2011.It was formerly allied to the Gulf Cartel and Los Zetas, but split off and became an independent organization.