(CNN)Here's a look at the Mexican Drug War. The Mexican government has been fighting a war with drug traffickers since December 2006. At the same time, drug cartels have fought each other for control of territory.
President Enrique Peña Nieto, who assumed the presidency on December 1, 2012, has continued the fight started by President Felipe Calderon against the cartels and drug-related violence. A huge victory for his administration was the 2014 arrest of Joaquin "El Chapo" Guzman, the boss of one of Mexico's most powerful drug trafficking operations, the Sinaloa cartel.
Beltran Leyva - Founded by the four Beltran Leyva brothers, Arturo, Carlos, Alfredo and Hector. Formerly aligned with the Sinaloa cartel, now aligned with Los Zetas against the Sinaloa, Gulf and La Familia Michoacana cartels.
December 11, 2006 - Newly elected Mexican President Felipe Calderon deploys more than 6,500 Mexican soldiers to the state of Michoacán to battle drug traffickers.