A suicide attack is any violent attack, usually entailing attackers detonating an explosive, where any attackers have accepted their own death as a direct result of the attacking method used. Suicide attacks have occurred throughout history, often as part of a military campaign (as with the Japanese kamikaze pilots of 1944–1945 during World War II), and more recently as part of Islamic terrorist campaigns (such as the September 11 attacks in 2001). Although generally not regulated under international law by themselves, many suicide attacks violate international laws of war such as perfidy or targeting civilians.
While few suicide attacks took place anywhere in the world from 1945 until 1980, between 1981 and September 2015 a total of 4,814 suicide attacks occurred in over 40 countries, killing over 45,000 people. During this time the global rate of such attacks grew from an average of three a year in the 1980s to about one a month in the 1990s to almost one a week from 2001 to 2003 to approximately one a day from 2003 to 2015.
Suicide attacks tend to be more deadly and destructive than other terror attacks because they give their perpetrators the ability to conceal weapons, make last-minute adjustments, and they do not require remote or delayed detonation, escape plans or rescue teams. They constituted only 4% of all terrorist attacks around the world over one period (between 1981 and 2006), but caused 32% of all terrorism-related deaths (14,599). Ninety percent of those attacks occurred in Afghanistan, Iraq, Israel, the Palestinian territories, Pakistan, and Sri Lanka. Overall, as of mid-2015, about three-quarters of all suicide attacks occurred in just three countries: Afghanistan, Pakistan, and Iraq.
Suicide attacks have been described (by W. Hutchinson) as a weapon of psychological warfare to instill fear in the target population, a strategy to eliminate or at least drastically diminish areas where the public feels safe and the "fabric of trust that holds societies together", as well as to demonstrate the lengths to which perpetrators will go to achieve their goals.