There is no universal definition of terrorism. Many governments have framed their own or accepted other definitions as given by experts for their judicial matters. In the broadest sense, it can be defined as the use of or threatened use violence to realise an objective that could be political, social, religious or ideological. Terrorism is a major threat to the world today as many countries are direct victims of internal and/or external terrorism. While some perpetrators are local and confine their work within a region or country, some others are global organisations with the ability to carry out attacks in any corner of the globe. Most victims of terror attacks are innocent civilians. Terrorism per se can be done by governments, nationalist groups, military groups, non-state actors, revolutionaries, religious groups, etc. This term became popular in usage after the Beirut barracks bombings of 1983, although it originated in 1794 during the French Revolution.