Question: In what year did this criminal group, formed by former soldiers of the Mexican Armed Forces and Founded by Nabor Vargas Garcia, break away from their former employer and form their own criminal organization?

full_context: Document 1: Omar Treviño Morales: Óscar Omar Treviño Morales (born January 26, 1974) is a convicted Mexican drug lord and former leader of Los Zetas, a criminal organization. He was one of Mexico's most-wanted drug lords. His brother is Miguel Treviño Morales, a former leader of the group. The authorities believe he was the successor of his brother, who was arrested on July 15, 2013.
Document 2: Joaquín &quot;El Chapo&quot; Guzmán: Joaquín Archivaldo Guzmán Loera (] ; born on 25 December 1954 or 4 April 1957) is a Mexican drug lord who headed the Sinaloa Cartel, a criminal organization named after the Mexican Pacific coast state of Sinaloa where it was formed. Known as "El Chapo" ("Shorty", ] ) for his 168 cm stature, he became Mexico's top drug kingpin in 2003 after the arrest of his rival Osiel Cárdenas Guillén of the Gulf Cartel, and was considered the "most powerful drug trafficker in the world" by the United States Department of the Treasury.
Document 3: La Resistencia (gang): La Resistencia (English: "The Resistance"), also known as Cárteles Unidos (English: "United Cartels") is a Mexican criminal enforcer squad composed of well trained gunmen from the Sinaloa Cartel, Gulf Cartel and Knights Templar Cartel dedicated to killing or expelling the Los Zetas Cartel operatives from the states of Michoacán and Jalisco.
Document 4: Efraín Teodoro Torres: Efraín Teodoro Torres (died 3 March 2007) was a Mexican suspected drug lord and one of the founders of Los Zetas, a criminal organization formed by former soldiers of the Mexican Armed Forces. He joined the Mexican Army in mid-1991 but deserted after seven years of service. In 1998, Torres was recruited by the drug lord Osiel Cárdenas Guillén to join the ranks of the Gulf Cartel, a drug trafficking organization. The new group formed by ex-commandos came to be known as Los Zetas.
Document 5: Mexikanemi: Mexikanemi is a gang known as the Texas Mexican Mafia, formed in the early 1980s in the Texan penal systems. It functions separately from the original California Mexican Mafia, and members consider themselves primarily tied to the area of Aztlán, formerly Mexican territories in the southwestern United States. The group engages in a wide range of illegal activities including drug trafficking, loan sharking, and money laundering.
Document 6: Rogelio González Pizaña: Rogelio González Pizaña (born 1 March 1974), commonly referred to by his alias Z-2 and/or El Kelín, is a Mexican former drug lord and one of the founders of Los Zetas, a criminal organization originally formed by ex-commandos from the Mexican Armed Forces. Unlike the rest of the founders of Los Zetas, however, he did not serve in the Mexican Armed Forces before joining the drug trade.
Document 7: Los Zetas: Los Zetas (] , Spanish for "The Zs") is a Mexican criminal syndicate. Considered by the US government to be "the most technologically advanced, sophisticated, efficient, violent, ruthless, and dangerous cartel operating in Mexico", the organization has expanded beyond the traditional purview of drug trafficking and also runs profitable sex trafficking and gun running rackets. The origins of Los Zetas date back to the late 1990s when commandos of the Mexican Army deserted their ranks and began working as the enforcement arm of the Gulf Cartel. In February 2010, Los Zetas broke away from their former employer and formed their own criminal organization.
Document 8: Galindo Mellado Cruz: Galdino or Galindo Mellado Cruz (18 April 1973 – 9 May 2014), commonly referred to by his alias El Mellado and/or Z-9, was a Mexican suspected drug lord and one of the founders of Los Zetas, a criminal organization originally formed by ex-commandos from the Mexican Armed Forces. He joined the Mexican Army in 1992 and was part of the Grupo Aeromóvil de Fuerzas Especiales (GAFE), an elite special forces unit of the Army. In 1999, he withdrew from the military and was recruited by the Gulf Cartel, a drug trafficking organization, shortly thereafter.
Document 9: Jalisco New Generation Cartel: The Jalisco New Generation Cartel (Spanish: "Cártel de Jalisco Nueva Generación" , "CJNG" and "Matazetas") is Mexican criminal group based in Jalisco and headed by Nemesio Oseguera Cervantes ("El Mencho"), one of Mexico's most-wanted drug lords. The CJNG are currently fighting the Knights Templar Cartel and Los Zetas for control of the cities of Guadalajara, Jalisco and the states of Michoacán and Veracruz. The CJNG also operates in the states of Nayarit, Colima, and Guanajuato. While this cartel is best known for its fights against the Zetas, it has also been battling La Resistencia for control of Jalisco and its surrounding territories.
Document 10: Juárez Cartel: The Juárez Cartel (Spanish: "Cártel de Juárez"), also known as the Vicente Carrillo Fuentes Organization, is a Mexican drug cartel based in Ciudad Juárez, Chihuahua, across the U.S.-Mexico border from El Paso, Texas. The cartel is one of several drug trafficking organizations that have been known to decapitate their rivals, mutilate their corpses and dump them in public places to instill fear not only into the general public, but also into local law enforcement and their rivals, the Sinaloa Cartel. The Juárez Cartel has an armed wing known as La Línea, a Juarez street gang that usually performs the executions. It also uses the Barrio Azteca gang to attack its enemies.
Document 11: Gustavo González Castro: Gustavo González Castro (born 1 July 1973), commonly referred to by his alias "El Erótico" ("The Erotic One"), is a Mexican drug lord and founding member of Los Zetas, a criminal organization originally formed by ex-commandos from the Mexican Armed Forces. He joined the Mexican Army as an infantry soldier in 1990, and ascended to the corporal unit five years later. By 1999, however, González Castro had resigned and began working for the Gulf Cartel and Los Zetas along with several former military men.
Document 12: Iván Velázquez Caballero: Iván Velázquez Caballero (born February 10, 1970), also known by his alias El Talibán, is a convicted Mexican drug lord of the criminal group known as Los Zetas. The government of Mexico listed Velázquez Caballero in 2009 as one of its 37 most-wanted drug lords and was offering up to $30 million pesos, the equivalent of over $2.5 million USD, for information leading to his capture.
Document 13: Nabor Vargas García: Nabor Vargas García (born 12 July 1976) is a Mexican suspected drug lord and one of the founders of Los Zetas, a criminal group formed by former soldiers of the Mexican Armed Forces.
Document 14: Juan García Ábrego: Juan García Ábrego (born September 13, 1944) is a former Mexican drug lord who started out his criminal career under the tutelage of his uncle Juan Nepomuceno Guerra, who is reported to be the former head of a criminal dynasty along the U.S.-Mexico border now called the Gulf Cartel.
Document 15: Beltrán-Leyva Cartel: The Beltrán-Leyva Cartel (also known as the Beltrán Leyva Organization (BLO); Spanish: "Cártel de los Beltrán Leyva" ("CBL")) was a Mexican drug cartel and organized crime syndicate, headed by the five Beltrán Leyva brothers: Marcos Arturo, Carlos, Alfredo, Mario Alberto and Héctor. Founded as a branch of the Sinaloa Cartel, the Beltrán Leyva cartel was responsible for transportation and wholesaling of cocaine, heroin and marijuana (and the production of the last two). It controlled numerous drug trafficking corridors, and engaged in human smuggling, money laundering, extortion, kidnapping, murder and gun-running.
ground_truth: 2010