Terrorism
Terrorism is, in the broadest sense, the use of intentionally indiscriminate violence as a means to create terror among masses of people; or fear to achieve a religious or political aim. It is used in this regard primarily to refer to violence during peacetime or in war against non-combatants. The terms "terrorist" and "terrorism" originated during the French Revolution of the late 18th century but gained mainstream popularity during the U.S. presidency of Ronald Reagan (1981–89) after the 1983 Beirut barracks bombings and again after the 2001 September 11 attacks and the 2002 Bali bombings.
Strategy and tactics of guerrilla warfare
In some cases, the use of terrorism can be an aspect of guerrilla warfare. Terrorism is used to focus international attention on the guerrilla cause, kill opposition leaders, extort money from targets, intimidate the general population, create economic losses, and keep followers and potential defectors in line. As well, the use of terrorism can provoke the greater power to launch a disproportionate response, thus alienating a civilian population which might be sympathetic to the terrorist's cause. Such tactics may backfire and cause the civil population to withdraw its support, or to back countervailing forces against the guerrillas.