HistoryData
war1990

The longest siege of a capital city in the history of modern warfare (1992–1996)

January 1, 1990

The siege of Sarajevo lasted 1,425 days, making it the longest siege of a capital city in modern warfare history.

Quick Facts

Year
1990
Category
war

Key Facts

Duration
5 April 1992 – 29 February 1996 (1,425 days)
Total killed
13,952 people
Civilians killed
5,434 people
Bombs dropped
At least 500,000 bombs
Pre-siege population
Approximately 435,000 people
Bosnian Serb siege force
13,000 initial troops soldiers

By the Numbers

5
Duration
13,952people
Total killed
5,434people
Civilians killed
500,000bombs
Bombs dropped

Location

Map of Sarajevo, Bosnia and HerzegovinaMap of Sarajevo, Bosnia and HerzegovinaSarajevo, Bosnia and Herzegovina

Cause → Event → Consequence

Cause

Following Bosnia and Herzegovina's declaration of independence after the 1992 referendum, Bosnian Serb forces sought to create the Republika Srpska by seizing Sarajevo. The Yugoslav People's Army and subsequently the Army of Republika Srpska encircled the city with 13,000 troops in the surrounding hills, cutting off the civilian population from essential supplies.

Event

From April 5, 1992 to February 29, 1996, Bosnian Serb forces blockaded Sarajevo, bombarding the city with artillery, tanks, and small arms, dropping at least 500,000 bombs. The ARBiH, numbering around 70,000 troops but lacking heavy weapons, defended the urban core while civilians endured prolonged periods without gas, electricity, or water.

Consequence

The siege ended following the Dayton Agreement in December 1995 and NATO's Operation Deliberate Force air campaign. Sarajevo's population fell to between 300,000 and 380,000 after the conflict. The ICTY subsequently convicted four Serb officials for crimes against humanity, with Radovan Karadžić and Ratko Mladić each sentenced to life imprisonment.

Belligerents & Mobilization Analysis

Side A

1 belligerent

Army of the Republic of Bosnia and Herzegovina (ARBiH)
Peak Mobilized Forces~70K
Estimated Casualties~6K
Casualty Rate8.8%
Forces vs Casualties ratio
0CasualtiesMobilized

Side B

1 belligerent

Army of Republika Srpska / Yugoslav People's Army
Peak Mobilized Forces~13K
Estimated Casualties~2K
Casualty Rate17.2%
Forces vs Casualties ratio
0CasualtiesMobilized
Key Commanders

Radovan Karadžić, Ratko Mladić, Stanislav Galić, Dragomir Milošević.

Total Casualties (all sides)
13,952
Outcome
Siege lifted following the Dayton Agreement (December 1995); Republika Srpska did not gain control of Sarajevo.

Timeline Context

Timeline around 199019901987198819891991199219931990–91 European Cup Winners' Cup — 1990–1991 edition of the European Cup Winners' Cup1990 FIBA World Championship — 1990 edition of the FIBA World Championship1990 FIFA World Cup — 14th FIFA World Cup, held in ItalyEurovision Song Contest 1990 — 35th edition of the Eurovision Song Contest1990 Formula One World Championship — sports season1990s — decade of the Gregorian calendar (1990–1999)1990 Asian Games — 11th edition of the Asian Games1990 African Cup of Nations — football tournamentsiege-of-sarajevo-1990