1980
MS-13 was founded by Salvadoran immigrants in Los Angeles.
1997
April 23: MS-13 kidnapped and murdered Ricardo Ernesto, the son of Ricardo Maduro, in San Pedro Sula, Honduras. Ricardo Maduro subsequently ran on an anti-crime platform for the presidency of Honduras and won the election.
2003
July 23: President Francisco Flores began tougher anti-gang policies in El Salvador.
August: President Ricardo Maduro of Honduras also implemented strict policies, making membership in a gang illegal and punishable by up to 12 years in prison. Maduro deployed the army in the streets to support the 8,000-member police force.
2004
Jan. 14: The leaders of El Salvador, Guatemala, Honduras and Nicaragua met in Guatemala City to discuss gang issues. They declared MS-13 and rival gang M-18 to be a regional security problem.
Aug. 30: President Antonio Saca stepped up anti-gang policies in El Salvador.
September: A report surfaced that suspected Al-Qaida member Adnan G. El Shukrijumah had been spotted in Honduras meeting with MS-13 leaders.
Dec. 23: Members of MS fired on a bus in Chamalecon, Honduras, killing 28 people and wounding 12. The gang left a note claiming they were members of a defunct Cunchonero People’s Liberation Movement. The note threatened President Ricardo Maduro, the National Congress president and other leading politicians who supported the death penalty and a crackdown on organized crime.
2005
February: The U.S. Immigration and Customs Enforcement agency launched Operation Community Shield, a nationwide law-enforcement initiative that targeted violent criminal street gangs. Initially, the effort focused on the MS-13 organization. In May 2005, ICE expanded the operation to include all criminal street gangs that pose a threat to national security and public safety. In those first few months of the program, ICE arrested 359 MS-13 members and associates, including 10 clique leaders.
March 17: By this date, the federal crackdown against MS-13 had resulted in more than 100 gang members being arrested in six U.S. cities.
August: The U.S. Attorney's Office in Maryland announced the indictment of 22 MS-13 members, charged under the federal Racketeer Influenced and Corrupt Organizations Act (RICO).
2006
January: A leaked Dept. of Homeland Security memo noted that Mexican drug smugglers planned to use MS-13 gang members to assassinate U.S. Border Patrol agents.
Sept. 7: At a prison in Zacatecoluca, central El Salvador, X-rays revealed four prisoners with cell phones hidden in their rectums. Officials also discovered nine cell phone chips and a charger. The phones were said to have been used to direct criminal activities from inside the prison.
2007
Jan. 12: The National Gang Intelligence Center, a unit of the U.S. Dept. of Justice, reported troublesome trends regarding the increased presence of gang members in the military. The center expressed concern over the potential for a breakdown in military discipline and the use of military training by gang members after they left the service. The report noted that MS-13 was among several gangs whose members had joined the military.
Feb. 5: In San Salvador, U.S. Attorney General Alberto R. Gonzales and Salvadoran President Elias Antonio Saca announced a collaborative effort to combat transnational gangs such as MS-13 and M-18. The initiative covered the identification and prosecution of the most dangerous Salvadoran gang members through programs to enhance gang enforcement, fugitive apprehension, international coordination, information sharing, and training and prevention. The initiative included a joint effort between the FBI and El Salvador’s Policia Nacional Civil (PNC) to establish a new Transnational Anti-Gang (TAG) program, with two FBI employees stationed in El Salvador to coordinate efforts.
Feb. 21: Two members of MS-13 were found guilty in Tegucigalpa of the Dec. 23, 2004, attack on a bus in Honduras that killed 28 people.
Feb. 25: Four Guatemalan policemen, imprisoned in Cuilapa, Guatemala, were killed during a riot at the Mara Salvatrucha-dominated prison facility. The dead included Luis Arturo Herrera, head of the Guatemalan National Police organized crime unit, and three of his officers. The officers, arrested in connection with the recent deaths of three prominent Salvadoran politicians, had been transferred to the jail several days earlier.
April 27: Three MS-13 leaders were convicted in Maryland of conspiracy to participate in a racketeering enterprise involving murder, robbery, obstruction of justice and witness tampering. The MS-13 members -- who were charged with involvement in multiple murders in Maryland and Virginia -- were prosecuted under the Racketeer Influenced and Corrupt Organizations (RICO) Act.
September: The first joint TAG operation led to the arrest of 10 MS-13 gang members in El Salvador. The gang members were affiliated with four different groups or cliques, including two of the most violent, “Los Teclanos” and “Los Pinos Locos Salvatruchos.” The investigation was part of a larger case involving 41 key MS-13 members indicted for 33 different murders.
2008
Jan. 14: The FBI issued a national threat assessment regarding MS-13. The agency concluded that the gang’s threat to the U.S. as a whole remained at the “medium” level of concern, but ranked “high” in the Northeast and West. The FBI estimated national membership in the gang at between 6,000 and 10,000.
Jan. 30: The impact of MS-13 on U.S. domestic security was seen as uncertain. The danger of both MS-13 and M-18 gangs “is not definitively known,” according to a Congressional Research Service report.
July 28: Three leaders of MS-13, pleaded guilty to participation in a racketeering enterprise before a federal court in Nashville, Tenn.
Oct. 26: Twenty-two individuals in the San Francisco Bay Area were indicted on federal racketeering and other charges arising from their participation in the MS-13. Seven additional individuals were charged with non-racketeering offenses including narcotics and firearms-trafficking, and attempted exportation of stolen vehicles.
Nov. 20: An MS-13 gang member and seven others were charged in New York City with multiple crimes, including 29 counts of murder, attempted murder, assault, racketeering, and illegal use of firearms.