 Even supply convoys bringing provisions from outside the state to the large garrison at New Brunswick were not immune to the American attacks, where the Raritan River and the roads from Perth Amboy offered opportunities for sniping and raiding.Their difficulties led British commanders to change tactics, attempting to lure these militia units into traps involving larger numbers of British regulars.But even this was not entirely successful, as wily militia and Continental commanders including Continental Army General William Maxwell used superior knowledge of the geography to set even more elaborate traps.