The war in Bosnia started after the country's Muslims and Croats voted to split from Serb-led Yugoslavia, triggering a rebellion by the Bosnian Serbs. The conflict, which saw Europe's worst bloodshed since World War II, lasted until a U.S.-brokered peace deal was signed in 1995.
The attack on the army convoy happened as the Serb-dominated military was about to withdraw from the predominantly Muslim town of Tuzla as part of an agreement with Bosnian authorities. Bosnian authorities in Sarajevo have maintained in past years that the Serbian soldiers had fired first and the Bosnian troops acted in self-defense.
Krstic and Vukmirica told the Serbian war crimes court that the Yugoslav army soldiers were under strict orders not to provoke the Tuzla Muslim troops.
"We heard the first shots as soon as we moved," Krstic said. "And, then more and more, it was frightening, a rain of bullets from everywhere."
Vukmirica said he was in a medical truck when it was hit and set on fire.
"They were firing from everywhere," he said. "I broke the window with my hands but they got stuck."
Both Krstic and Vukmirica were seriously wounded in the attack. They were first taken to a hospital before being sent to prison where they stayed until they were exchanged for Muslim war prisoners several months later.