Background: Tajikistan has experienced three changes in government and a civil war since it gained independence in 1991 when the USSR collapsed. A peace agreement among rival factions was signed in 1997, but implementation has progressed slowly. Nevertheless, a number of opposition political parties have been legalized and are participating in elections, suggesting that the country may be stabilizing politically. Russian-led peacekeeping troops are based throughout the country, and Russian-commanded border guards are stationed along the border with Afghanistan.