One reason for this unexpected resistance was the aid of the Indians. The Latin races have always had more influence over savage dependents than the Anglo-Saxon. The French knew how to use the Indians as auxiliaries by letting them make war on their own account and in their own barbarous fashion. Nevertheless the Indians did not fight for the mere sake of obliging the French, and when the tide turned, in 1759, they were mostly detached. One other great advantage was enjoyed by the French: their territory was difficult of access. The exposed coast was protected by the strong fortresses of Louisbourg and Quebec, On the east, in the centre, and on the Ohio they were in occupation and stood on the defensive. Acting on the interior of their line, they could mass troops at any threatened point. In the end their line was rolled up like a scroll from both ends. Louisbourg and Fort Duquesne were both taken in 1758, but Montreal was able to hold out until 1760. 15. CONGRESS OF ALBANY (1754). [Sidenote: Indian treaty.] [Sidenote: Union proposed] Foreseeing a general colonial war, the Lords of Trade, in September, 1753, directed the colonial governors to procure the sending of commissioners to Albany. The first purpose was to make a treaty with the Iroquois; but a suggestion was made in America that the commissioners also draw up a plan of colonial union. In June, 1754, a body of delegates assembled from the New England colonies, New York, Pennsylvania, and Maryland. The Indian treaty was duly framed, notwithstanding the ominous suggestion of one of the savages: "It is but one step from Canada hither, and the French may easily come and turn you out of your doors." On June 24 the Congress of Albany adopted unanimously the resolution that "a union of all the colonies is at present absolutely necessary for their security and defence;" and that "it would be necessary that the union be established by Act of Parliament." [Sidenote: Franklin's scheme.]