 Complete the following phrase:  In 1759, at the height of the Seven Years War, Charles was summoned to a meeting in Paris with the French foreign minister, the Duc De Choiseul. Charles failed to make a good impression, being argumentative and idealistic in his expectations. Choiseul was planning a full-scale invasion of England, involving upwards of 100,000 mento which he hoped to add a number of Jacobites led by Charles. However, he was so little impressed with Charles, he dismissed the prospect of Jacobite assistance. The French invasion, which was Charless last realistic chance to recover the British throne for the Stuart dynasty, was ultimately thwarted by naval defeats at 