Violence in the island's north-west, where the colonists were servants of the Van Diemen's Land Company, erupted in 1825, fuelled by disputes over Aboriginal women, who were often violated or abducted, and the destruction of kangaroo stocks. An escalating cycle of violence broke out in 1827 after white shepherds attempted to force themselves on black women; a shepherd was speared and more than 100 sheep killed in retribution and in turn a white party launched a dawn attack on an Aboriginal campsite, killing 12. The conflict led to the Cape Grim massacre of 10 February 1828 in which shepherds armed with muskets ambushed up to 30 Aboriginal people as they collected shellfish at the foot of a cliff.[50]