This paper intends to provide an understanding of the Brazilian involvement in the UN Stabilization Mission in Haiti (MINUSTAH). To that end, it discusses and reviews, based on public information sources, the Brazilian decision to approve, participate and lead the MINUSTAH task force; describes the political path actually followed for achieving an effective decision-making implementation, emphasizing some controversial issues that were submitted to the National Congress for consideration; and some of the mission’s internal goals are also discussed, with emphasis on certain controversial issues. Some of the conclusions are not in tune with what is usually believed and interpreted in Brazil by the general public: for instance, an existing link, as far as MINUSTAH is concerned, between the more visible Brazilian political goals and any other long-term economic goals; the likelihood of the Brazilian decision altering the country's foreign policy nature, and therefore, facing more resistance in the National Congress for any government decisions; and having a Group of Marines (Fuzileiros Navais) attached to an Army Commander is also identified as a significant innovation in Brazilian military operations.