Prospect became the boundary between colonists and indigenous Australians. Hostility grew until by 1797, where a state of guerrilla warfare existed between indigenous people and the settler communities at Prospect and Parramatta. The aboriginal people were led by their leader, Pemulwuy, a member of the Bidjigal tribe who occupied the land. Pemulwuy was the main leader of raids against the colony in the 1790s. In 1797 the war escalated; his guerrillas started regular raids on settlements in the Parramatta and Prospect Hill areas. British military expeditions failed to locate and capture Pemulwuy.