her son Rajiv Gandhi (neither of whom was related to Mahatma Gandhi, who had himself been assassinated in 1948), were assassinated in 1984 and 1991 in what were linked to separatist movements in Punjab and northern Sri Lanka, respectively. In 1994, the assassination of Juvénal Habyarimana and Cyprien Ntaryamira during the Rwandan Civil War sparked the Rwandan genocide. In Israel, Prime Minister Yitzhak Rabin was assassinated on November 4, 1995, by Yigal Amir, who opposed the Oslo Accords. In Lebanon, the assassination of former Prime Minister Rafik Hariri on February 14, 2005, prompted an investigation by the United Nations. The suggestion in the resulting Mehlis report that there was involvement by Syria prompted the Cedar Revolution, which drove Syrian troops out of Lebanon. Further motivations As a military and foreign policy doctrine Assassination for military purposes has long been espoused: Sun Tzu, writing around 500 BC, argued in favor of using assassination in his book The Art of War. Nearly 2000 years later, in his book The Prince, Machiavelli also advises rulers to assassinate enemies whenever possible to prevent them from posing a threat. An army and even a nation might be based upon and around a particularly strong, canny, or charismatic leader, whose loss could paralyze the ability of both to make war. For similar and additional reasons, assassination has also sometimes been used in the conduct of foreign policy. The costs and benefits of such actions are difficult to compute. It may not be clear whether the assassinated leader gets replaced with a more or less competent successor, whether the assassination provokes ire in the state in question, whether the assassination leads to souring domestic public opinion, and whether the assassination provokes condemnation from third-parties. One study found that perceptual biases held by leaders often negatively affect decision making in that area, and decisions to go forward with assassinations often reflect the vague hope that any successor might be better. In both military and foreign policy assassinations, there is the risk that the target could be replaced by an even more competent leader, or that such a killing (or a failed attempt) will prompt the masses to contemn the killers and support the leader's cause more strongly. Faced with particularly brilliant leaders, that possibility has in various instances been risked, such as in the attempts to kill the Athenian Alcibiades during the Peloponnesian War. A number of additional