In February 2007, the United Nations officially shut down its peacekeeping operations in Burundi and turned its attention to rebuilding the nation's economy, which relies heavily on tea and coffee, but which had suffered severely during 12 years of civil war. The UN had deployed 5,600 peacekeepers since 2004, and several hundred troops remained to work with the African Union in monitoring the ceasefire. The UN Post Conflict Fund (PBF) pledged $35 million to Burundi to work on infrastructure, to promote democratic practices, to rebuild the military, and to defend human rights.