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.
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.
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.
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.
Alfredo Beltrán Leyva (born January 21, 1971), commonly referred to by his alias El Mochomo (The Desert Ant), is a convicted Mexican drug lord and former leader of the Beltrán-Leyva Cartel, a drug trafficking organization.
 He was one of Mexico's most-wanted drug lords.
 Beltrán Leyva was responsible for smuggling multi-ton shipments of cocaine and methamphetamine to the United States from Mexico and South America between the 1990s and 2000s.
 He worked alongside his brothers Héctor, Carlos, and Arturo.
Los Mazatlecos (The Mazatlan people) is an enforcer gang of the Beltrán Leyva Cartel, currently led by Héctor Beltrán Leyva and Fausto Isidro Meza Flores.
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.
Fausto Isidro Meza Flores (born June 19, 1982), commonly referred to by his criminal alias El Chapo Isidro ("Shorty Isidro"), is a Mexican drug lord and high-ranking leader of the Beltrán Leyva Cartel, a drug trafficking organization.
 He is also the alleged leader of Los Mazatlecos and the right-hand man of the drug lords Héctor and Alfredo 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.
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.

Question: When was the Mexican American suspected drug lord which Héctor Beltrán Leyva declared war on born 
Answer: August 11, 1973