The Siege of Sarajevo is the longest siege of a capital city in the history of modern warfare. Serb forces of the Republika Srpska and the Yugoslav People's Army besieged Sarajevo, the capital city of Bosnia and Herzegovina, from 5 April 1992 to 29 February 1996 during the Bosnian War. The siege lasted three times longer than the Siege of Stalingrad and a year longer than the Siege of Leningrad. 
Siege of Sarajevo: More than 10,000 people were killed during the siege of Sarajevo which began in 1992 and lasted over three and a half years. Here Zimeta Smaic (left) and family members cry as a relative is evacuated from Sarajevo State Hospital, 30 April 1994. Photograph by Peter Northall/Associated Press.