Now the work that Andros had come over to perform, and that which was most important in his eyes, was the defense of New England against the French. The contest between the two nations for control of the New World had already begun. The territory between Hudson Bay and the St. Lawrence and that between the Penobscot and the St. Croix were already in dispute, and New Englanders had taken their part in the conflict. When Governor of New York, Andros had become aware of the French danger, and his successor Dongan had proved himself capable of holding the Iroquois Indians to their allegiance to the English and of extending the beaver trade in the Mohawk Valley. But at this juncture reports kept coming in of renewed incursions of the French, led by the Canadian nobility, into the regions south of Lakes Erie and Ontario, and of new forts on territory that the English claimed as their own. There was increasing danger that the French would embroil the Indians of the Five Nations and, by drawing them into a French alliance, threaten not only the fur trade but the colonies themselves. The French Governor, Denonville, declared that the design of the King his master was the conversion of the infidels and the uniting of "all these barbarous people in the bosom of the Church"; but Dongan, though himself a Roman Catholic, saw no truth in this explanation and demanded that the French demolish their forts and retire to Canada, whence they had come. Just as this quarrel with the French threatened to arouse the Indians in northwestern New York, so it threatened to arouse, as eventually it did arouse, the Indians along the northern frontier of New England. To the authorities in England and to Andros in America, this menace of French aggression was one of the dangers which the Dominion of New England was intended to meet, and the substitution of a single civil and military head for the slow-moving and ineffective popular assemblies was designed to make possible an energetic military campaign.