Leading a large and competitive agricultural state, Lula generally opposed and criticized farm subsidies, and this position has been seen as one of the reasons for the walkout of developing nations and subsequent collapse of the Cancún World Trade Organization talks in 2003 over G8 agricultural subsidies. Brazil played an important role in negotiations regarding internal conflicts in Venezuela and Colombia, and concentrated efforts on strengthening Mercosur. During the Lula administration, Brazilian foreign trade increased dramatically, changing from deficits to several surpluses after 2003. In 2004, the surplus was US$29 billion, due to a substantial increase in global demand for commodities. Brazil also provided UN peace-keeping troops and led a peace-keeping mission in Haiti.