Bouillon remained French till 1814, and Vauban called it "the key of the Ardennes."
Upon the disgrace of Vauban, whose Dime royale had much in common with Boisguilbert's plan, Boisguilbert violently attacked the controller in a pamphlet, Supplement au detail de la France.
De Vauban, which is simply Boisguilbert's Detail de la France.
Louis' own army, originally collected for the relief of Charleroi in December, advanced on Maastricht, and after a brief siege, in which Vauban directed the besiegers, captured this most important fortress (June 29th, 1673).
The king's part in the campaign was, as usual, a war of sieges; an army under his personal command overran Franche-Comte in six weeks, and Louis, aided by the genius of Vauban, reduced Besancon in nine days.