Ratko Mladić, the Bosnian Serb military commander who oversaw some of the worst atrocities in Europe since World War II, died in prison on August 27, 2026, at the age of 84. Mladić had been serving a life sentence at the United Nations Detention Unit in The Hague, Netherlands, following his 2017 conviction by the International Criminal Tribunal for the former Yugoslavia.

Mladić was found guilty of genocide, war crimes, and crimes against humanity for his role as commander of the Bosnian Serb Army during the 1992–1995 Bosnian War. Most notably, he was held responsible for the Srebrenica massacre of 1995, during which more than 8,000 Bosniak Muslim men and boys were systematically executed — the single worst act of mass killing on European soil since the Holocaust. He was also convicted for directing the nearly four-year siege of Sarajevo, which killed thousands of civilians.

Mladić had been a fugitive for years before his arrest in Serbia in 2011, after spending more than a decade evading international capture. His trial before the international tribunal lasted several years and included extensive testimony from survivors of the massacres and siege. An appeals court upheld his life sentence in 2021.

His death in custody marks the end of a chapter in international criminal accountability for the Balkan conflicts of the 1990s, a period that reshaped European borders and led to the creation of new international legal frameworks for prosecuting war crimes. Survivors' groups and international human rights organizations had long insisted that Mladić be held accountable in life, and his conviction was widely regarded as a landmark in international justice.

Mladić's legacy remains deeply contested in the region. While he is viewed by many Serbs as a military hero, he is remembered by Bosniaks and much of the international community as a war criminal whose orders led to mass murder and ethnic cleansing. Reactions to his death are expected to reflect those entrenched divisions across the former Yugoslav states.