Herzegovina. Serb sources maintain that casualties and losses during the period prior to the creation of the safe area gave rise to Serb demands for revenge against the Bosniaks based in Srebrenica. The ARBiH raids are presented as a key motivating factor for the July 1995 genocide. This view is echoed by international sources including the 2002 report commissioned by the Dutch government on events leading to the fall of Srebrenica (the NIOD report). In Balkan Genocides: Holocaust and Ethnic Cleansing in the Twentieth Century, scholar Paul Mojzes notes that a great deal of animosity towards the men of Srebrenica stems from the period of May 1992 to January 1993 where forces under Orić's leadership attacked and destroyed scores of Serbian villages. Evidence indicated that Serbs had been tortured and mutilated and others were burned alive when their houses were torched. The efforts to explain the Srebrenica massacre as motivated by revenge have been dismissed as bad faith attempts to justify the genocide. The ICTY Outreach Programme notes that the claim that Bosnian Serb forces killed the prisoners from Srebrenica in revenge for crimes committed by Bosnian Muslim forces against Serbs in the villages around Srebrenica provides no defence under international law and soldiers, certainly experienced officers, would be aware of the fact. To offer revenge as a justification for crimes is to attack the rule of law, and civilization itself, and nor does revenge provide moral justification for killing people simply because they share the same ethnicity as others who perpetrated crimes. The methodical planning and mobilization of the substantial resources involved required orders to be given at a high command level. The VRS had a plan to kill the Bosnian Muslim prisoners, as Bosnian Serb war criminal Dragan Obrenović confirmed. The UN Secretary-General's report on the fall of Srebrenica said: "Even though this accusation is often repeated by international sources, there is no credible evidence to support it... The Serbs repeatedly exaggerated the extent of the raids out of Srebrenica as a pretext for the prosecution of a central war aim: to create a geographically contiguous and ethnically pure territory along the Drina." Claim that the planning of mass executions in Srebrenica defies military logic During Radislav Krstić's trial before the ICTY, the prosecution's military advisor, Richard Butler, pointed out that by carrying out a mass execution, the Serb Army deprived themselves of an extremely valuable bargaining counter.