An occurrence of the Krogan Rebellions, giving its name to a modern holiday.
Sometimes known to turians as the "Zeugitanian Disaster" after the place where it happened, the original battle saw three Turian Hierarchy legions under the command of Kintikos Borun obliterated by krogan under Warlord Irdkrim. Irdkrim's victory, and his acquisition of many trophies, is celebrated in a number of krogan communities as "Borunian Massacre". Although Irdkrim was defeated in a retaliatory strike not long after the battle, and is widely believed to have starved after being sealed in a cave under siege, his triumph is still held as something worth celebrating - no matter what turians might think.
Celebrations on Borunian Massacre might include krond tournaments held in Irdkim’s memory.