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.
Nationalist terrorism
Nationalist terrorism is a form of terrorism motivated by nationalism. Nationalist terrorists seek to form self-determination in some form, which may range from gaining greater autonomy to establishing a completely independent, sovereign state (separatism). Nationalist terrorists often oppose what they consider to be occupying, imperial, or otherwise illegitimate powers.