its roots in the 19th and early 20th-century anarchist terrorism, and became pronounced during the Cold War following the aftermath of World War II. Modern left-wing terrorism developed in the context of the political unrest of 1968. In Western Europe, notable groups included the West German Red Army Faction (RAF), the Italian Red Brigades (BR), the French Action Directe (AD), and the Belgian Communist Combatant Cells (CCC). Asian groups have included the Japanese Red Army and the Liberation Tigers of Tamil Eelam, although the latter organization later adopted nationalist terrorism. In Latin America, groups that became actively involved in terrorism in the 1970s and 1980s included the Nicaraguan Sandinistas, the Peruvian Shining Path and the Colombian 19th of April Movement. A 2014 paper by Kis-Katos et al. concluded that left-wing terrorism was the most prevalent terrorism in the past but has largely declined in the present day. United States The Weather Underground was a domestic terrorist group that developed as "a small, violent offshoot of Students for a Democratic Society," a group that originated in the 1960s to advocate for social change. Between 1973 and 1975, the Symbionese Liberation Army was active, committing bank robberies, murders, and other acts of violence. Other terrorist groups such as the small New World Liberation Front resorted to death threats, drive-by shootings and planting of pipe-bombs in the late 1970s. During the 1980s, both the May 19th Communist Organization (M19CO) and the smaller United Freedom Front were active. After 1985, following the dismantling of both groups, one source reports there were no confirmed acts of left-wing terrorism by similar groups. Incidents of left-wing terrorism dropped off at the end of the Cold War (circa 1989), partly due to the loss of support for communism. In October 2020, the killing of Aaron Danielson was added to the CSIS terrorism database as a deadly "far-left" attack, the first such incident in over two decades. The killing is also referenced on the Anti-Defamation League's page on antifa, as the only "suspected antifa-related murder" to date; and the left-leaning liberal think tank New America Foundation's tally of killings during terrorist attacks in the U.S. since 9/11, as the first recorded fatality in a far-left attack. 19 May Communist Organization The May 19th Communist Organization, also referred to as the 19 May Communist Coalition, was a United States-based, self-described revolutionary organization formed by splintered-off members of the Weather Underground