Former Yugoslavian Gen. Momcilo Perisic faced the court at The Hague Thursday on 13 counts of war crimes and crimes against humanity for the July 1995 massacre at Srebrenica.
Perisic faces a maximum life term for war crimes perpetrated against some 8,000 Muslims, including murder and extermination.
Prosecutors will try to establish a correlation between the Yugoslavian army based in Belgrade and Bosnian forces commanded by Gen. Ratko Mladic. The other alleged overseer of the atrocities in the 1992-95 Bosnian war, Radovan Karadzic, was arrested July 21 following over a decade of pursuit.
If successful, it would be the most damning evidence suggested former Yugoslav President Slobodan Milosevic, who died of a heart attack in 2006 during his own trial at the war crimes court.
