Question: When was the Mexican American suspected drug lord which Héctor Beltrán Leyva declared war on born 

full_context: Document 1: 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 2: 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 3: Héctor Beltrán Leyva: Héctor Beltrán Leyva (born 15 February 1965) is a Mexican suspected drug lord and former leader of the Beltrán Leyva Cartel, a drug trafficking organization. He is the brother of Arturo Beltrán Leyva (deceased), former leader of the cartel. Héctor was the second-in-command and rose to the leadership of the criminal organization after his brother's death on 16 December 2009 during a confrontation with Mexican marines.
Document 4: 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 5: 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 6: Edgar Valdez Villarreal: Edgar Valdez Villarreal (born August 11, 1973) also known as La Barbie ("The Barbie"), is a Mexican American suspected drug lord and leader of the Beltrán Leyva Cartel, a criminal group based in Sinaloa. He was arrested near Mexico City in August 2010 on charges related to large scale drug trafficking.
Document 7: 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.
Document 8: Arturo Beltrán Leyva: Marcos Arturo Beltrán Leyva (September 27, 1961 – December 16, 2009) was an organized crime figure and the leader of the Mexican drug trafficking organization known as the Beltrán-Leyva Cartel, which is headed by the Beltrán Leyva brothers: Marcos Arturo, Carlos, Alfredo and Héctor. The cartel is responsible for cocaine, marijuana, heroin and methamphetamine production, transportation and wholesaling. It controls numerous drug trafficking corridors into the United States and is also responsible for human smuggling, money laundering, extortion, kidnapping, murder, contract killing, torture, gun-running and other acts of violence against men, women, and children in Mexico. The organization is connected with the assassinations of numerous Mexican law enforcement officials.
Document 9: 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 10: La Barredora: La Barredora ("The Sweeper Truck") is a criminal gang based in the Mexican resort city of Acapulco, Guerrero and its surrounding territories. The criminal group came into existence during the rapid decentralization of Mexico's drug trafficking organizations and as a split-off group of the Beltrán Leyva Cartel. Originally, the Beltrán Leyva cartel operated in the city, but the group no longer has presence in Acapulco. After the Mexican military gunned down the top boss of the cartel – Arturo Beltrán Leyva – in December 2009, his brother Héctor Beltrán Leyva took control of one of the factions of the cartel and declared war on Edgar Valdez Villarreal, who had long been the right hand of Arturo. Amidst the violence, Valdez Villarreal tried to appoint a successor, but those in Acapulco broke off and formed their own criminal gang: the Independent Cartel of Acapulco. Within weeks, however, the group had splittered too, forming a new and rival group known as La Barredora. Villarreal Valdez was then captured by the Mexican Federal Police in August 2010, but the violence between the groups for the control of Acapulco continued.
Document 11: Barrio Azteca: The Barrio Azteca (] ), or Los Aztecas (] ), is a Mexican-American gang originally based in El Paso, Texas. The gang was formed in the jails of El Paso in 1986 and expanded into a transnational criminal organization. They are currently one of the most violent gangs in the United States and are said to have over 3,000 members in the U.S. in locations such as New Mexico, Texas, Massachusetts and Pennsylvania and at least 5,000 members in Ciudad Juarez, Mexico.
Document 12: Hermanos de Pistoleros Latinos: Hermandad de Pistoleros Latinos (HPL, a.k.a. Pistoleros Latinos or Cuetes) is a Latino prison gang founded by Chino Avitia in Texas during the early 1980s. The English translation of the gang's name is "Brotherhood of Latin Gunmen". It operates in all Texas prisons and on the streets in many communities in Texas, particularly in Laredo. HPL is active throughout Mexico with its largest contingent in Nuevo Laredo. The gang is structured and is estimated to have 1,000 members. Members maintain close ties to several Mexican drug trafficking organizations and are involved in the trafficking of large quantities of cocaine and marijuana from Mexico into the United States for distribution.
Document 13: Eduardo Arellano Félix: Eduardo Arellano Félix (born October 11, 1956) is a Mexican drug trafficker, brother of Benjamín, Ramón, Javier and sister Enedina, all drug traffickers. The Arellano-Félix Organization, also known as the Tijuana Cartel, has been responsible for countless murders and the smuggling of thousands of tons of marijuana, cocaine, heroin and methamphetamine for more than a decade. The DEA believes that the Arellano-Félix brothers were responsible for the numerous smuggling tunnels that were found in January 2006.
Document 14: Carlos Beltrán Leyva: Carlos Beltrán Leyva (born 1969) is an incarcerated Mexican drug lord with the Beltrán-Leyva Cartel. The cartel was created by the four Beltrán Leyva brothers: Héctor, Alfredo and Arturof Family: Adriana Karla daughter. Born in the Sinaloan countryside in the late 1960s, Carlos and his brothers worked closely with Joaquín "Chapo" Guzmán, the leader of the Sinaloa Cartel, during decades of smuggling.
Document 15: Independent Cartel of Acapulco: The Independent Cartel of Guerrero (Spanish: Cártel Independiente de Acapulco or CIDA) was a criminal gang based in the Mexican resort city of Acapulco, Guerrero and its surrounding territories. The criminal group came into existence during the rapid decentralization of Mexico's drug trafficking organizations and as a split-off group of the Beltrán Leyva Cartel. Originally, the Beltrán Leyva cartel operated in the city, but the group no longer has presence in Acapulco. After the Mexican military gunned down the top boss of the cartel – Arturo Beltrán Leyva – in December 2009, his brother Héctor Beltrán Leyva took control of one of the factions of the cartel and declared war on Edgar Valdez Villarreal, who had long been the right hand of Arturo. Amidst the violence, Valdez Villarreal tried to appoint a successor, but those in Acapulco broke off and formed their own criminal gang: the Independent Cartel of Acapulco. Within weeks, however, the group had splittered too, forming a new and rival group known as La Barredora. Villarreal Valdez was then captured by the Mexican Federal Police in August 2010, but the violence between the groups for the control of Acapulco continued.
ground_truth: August 11, 1973