A dismal episode:
"The year 1756 was disastrous for England in America, and indeed upon all fronts. Oswego, the only English fort on the Great Lakes, was lost. The campaign of 1757 was hardly more successful. The fortress of Louisburg, which commanded the Gulf of St Lawrence, had been taken by an Anglo-Colonial force in the 1740's and returned to France at the peace treaty of 1748 at Aix-La-Chapelle. English troops were now sent to recapture it. They were commanded by an ineffectual and unenterprising officer, Lord Loudon. Loudon prepared to attack by concentrating at Halifax such colonial troops from New England as the colonies would release. This left the Hudson valley open to the French. At the head of the valley were three small forts: Crown Point, Edward, and William Henry. The French, under the Governor of Canada, Montcalm, and his Red Indian allies, swept over the frontier through the wooded mountains and beseiged fort William Henry. The small colonial garrison held out for five days, but was forced to surrender. Montcalm was unable to restrain his Indians and the prisoners were massacred. The tragedy bit into the minds of the New Englanders. It was Loudon who was to blame. The British were not defending them; while New England was left exposed to the French, the troops which might have protected them were wasting time at Halifax. Indeed, by the end of July Loudon decided that Louisburg was impregnable and had give up the attempt."
Churchill chapter 5 of Volume 3
PS - if you like Churchill's writing try: "The Malakand Field Force"http://www.gutenberg.org/files/9404/9404-h/9404-h.htm
Some of the place names are familiar a century later.