In October 1834 Stirling personally led a group of twenty-five police, soldiers and settlers in a punitive expedition against approximately seventy Bindjareb men, women and children camped on the Murray River partly in retaliation for several murders and thefts. This bloody attack involving rifles and bayonets against spears is known as the Pinjarra massacre—and sometimes still the Battle of Pinjarra. An uncertain number of Aboriginal men, women and children were killed during this encounter; Stirling reported 15 males killed, John Septimus Roe 15–20, and an unidentified eyewitness 25–30 including 1 woman and several children with probably more floating down with the stream. One of Stirling's party was injured and one was injured and died about two weeks later, although it is uncertain if from existing injuries, injuries suffered during the massacre, poor medical treatment after the massacre, or a combination thereof. An uncertain number of Bindjareb were injured, and an uncertain number died of their injuries.