Sullivan's army carried out a scorched earth campaign, methodically destroying at least forty Iroquois villages throughout the Finger Lakes region of western New York, to put an end to Iroquois and Loyalist attacks against American settlements as had occurred the previous year of 1778, such as the Cobleskill, Wyoming Valley and Cherry Valley massacres. The survivors fled to British regions in Canada and the Niagara Falls and Buffalo areas. The devastation created great hardships for the thousands of Iroquois refugees who fled the region to shelter under British military protection outside Fort Niagara that winter, and many starved or froze to death, despite strenuous attempts by the British authorities to import food and provide shelter via their limited resources.