But Newcastle was not the man to uphold a ministry during a time of such difficulty as was evidently approaching. Everything pointed to a speedy renewal of war. At the Peace of Aix-la-Chapelle the limits of our American colonies had been left undefined; while in India, where Dupleix and Labourdonnais had inflicted heavy blows on the English during the war, although the nations were at peace, the French and English contrived to continue their rivalry by allying themselves with native princes, and Clive had already rendered his name famous by the defence of Arcot and the restoration of English power in the Carnatic.[7] Thus there were dangers both in the East and in the West. In America the main object of the French was to secure the valley of the Mississippi, to connect by this channel their Canadian colonies with those upon the Gulf of Mexico, and thus to confine the English to the strip of country between the Alleghany mountains and the sea. The English would thus be constantly threatened on all sides, cut off from direct intercourse with the Indians, and from all hope of any extension of their settlements towards the west. The French began their encroachments by erecting forts on the Ohio river, which were to secure the connection between the Mississippi valley and Canada. A colonial war, in which the name of Washington first becomes prominent, arose from these encroachments. And this local warfare continued, till it became necessary for the Government to take the matter up. A force under General Braddock was therefore despatched against Fort Duquesne on the Ohio; but his careless stupidity led him into an ambush, where he himself and a great number of his troops were killed. [Sidenote: Newcastle tries to confine the war to the colonies.]