guerrilla organization that seeks to establish an independent Tamil state, Eelam, in northern and eastern Sri Lanka.

Formed in 1972 by Vellupillai Prabhakaran, the LTTE is one of the world's most sophisticated and tightly organized insurgent groups. During the 1970s the LTTE carried out a number of guerrilla attacks. In 1983, after the killing of 13 soldiers by Tamil guerrillas and retaliatory attacks by the Sri Lankan military, large-scale violence erupted between the government and the LTTE. By 1985 the group was in control of Jaffna and most of the Jaffna Peninsula in northern Sri Lanka. Under Prabhakaran's orders, the LTTE eliminated most of its rival Tamil groups by 1987. To fund its operations, the group engaged in bank robberies and drug smuggling.

The LTTE lost control of Jaffna in October 1987 to an Indian peacekeeping force (IPKF) that had been sent to Sri Lanka to assist in the implementation of a complete cease-fire. However, following the withdrawal of the IPKF in March 1990, the Tigers grew in strength and conducted several successful guerrilla operations and terrorist (terrorism) attacks. On May 21, 1991, a suicide bomber killed former Indian prime minister Rajiv Gandhi (Gandhi, Rajiv) while he was campaigning in the Indian state of Tamil Nadu. Other attacks included an August 1992 land-mine explosion in Jaffna, which killed 10 senior military commanders; the May 1993 assassination of Sri Lankan President Ranasinghe Premadasa; and a January 1996 suicide bomb attack on the central bank of Colombo that killed 100 people. An elite unit of the LTTE, the “Black Tigers,” is responsible for carrying out suicide attacks. If faced with unavoidable capture by Sri Lankan authorities, Black Tigers purportedly commit suicide by swallowing cyanide capsules that they wear around their necks.

Negotiations between the LTTE and the government broke down in the mid-1990s. In December 2000 the LTTE declared a unilateral cease-fire, which lasted only until April. Thereafter, fighting between the guerrillas and the government again intensified until February 2002, when the government and the LTTE signed a permanent cease-fire agreement. Sporadic violence continued, however, and in 2006 the European Union added the LTTE to its list of banned terrorist organizations. Soon after, heavy fighting erupted between the rebels and government forces; thousands were killed, bringing the number of civil-war-related deaths in Sri Lanka to nearly 70,000 since the bilateral outbreak of violence in the early 1980s. In January 2008 the government formally abandoned the 2002 cease-fire agreement, and authorities captured major strongholds of the LTTE over the following months. The town of Kilinochchi, the administrative centre of the LTTE, came under government control in January 2009.