The present thesis focuses on sexual abuse and exploitation (SEA) committed by members of the military components of United Nations peacekeeping operations. In the 1990s, with the increase of the tasks exercised by, and the number of troops in peacekeeping operations cases of SEA became ever more numerous. The extreme poverty and vulnerability from which most of the women and girls in peacekeeping host countries find themselves, the impunity of UN soldiers and the huge disparity between their resources and those of local populations has as a consequence a number of forms of exploitative sexual relationships, that go from the use of prostitutes to more longterm arrangements. Such sexual interactions have a series of negative consequences not only for the victims, but also for the credibility of UN missions and of the Organization itself. After years of institutional inertia, the subject eventually gained some profile within UN policy, with the introduction of a series of measures to combat SEA. Nevertheless, these policies have shown limited effectiveness faced with the immunity granted to the soldiers in question. Given these limitations, the research upon which this thesis is based has as a goal the verification of the hypothesis that the training on SEA implemented in the troop-contributing countries can be an effective tool in combating these crimes. To do so, it analyzes the training implemented in Brazil s Army and Navy- which furnish the lead contingent of the United Nations Stabilization Mission in Haiti (MINUSTAH), and in the Indian Army - the main troop contributing country to the United Nations Mission in the Democratic Republic of Congo (MONUC).