Arthur enforced the border by deploying almost 300 troops from the 40th and 57th Regiments at 14 military posts along the frontier and within the Settled Districts. The tactic appeared to deter Aboriginal attacks; through the winter of 1828 few Aboriginal people appeared in the Settled Districts, and those that did were driven back by military parties. Among them were at least 16 undefended Oyster Bay people who were killed in July at their encampment in the Eastern Tiers by a detachment of the 40th Regiment.[36]