 There he built two forts, Fort Halifax (Maine) and Fort Western.In 1755, he was appointed lieutenant-colonel of a provincial regiment raised by Shirley to aid Lieutenant Governor Charles Lawrence of Nova Scotia in his attempts to sweep French Acadian influence from the province, and played an important role at the capture of Fort Beauséjour in June 1755.During the Bay of Fundy Campaign (1755), Winslow was then ordered to proceed to Grand-Pré, Nova Scotia, to remove the Acadian population, as part of the infamous Great Upheaval.