Various, Encyclopaedia Britannica, 11th Edition…
“ As a boy, under his father’s careful supervision, he studied diligently at the Jesuits’ College at Bourges, and at seventeen, in the absence of his father, he governed Burgundy. The duc d’Enghien, as he was styled during his father’s lifetime, took part with distinction in the campaigns of 1640 and 1641 in northern France while yet under twenty years of age.During the youth of Enghien all power in France was in the hands of Richelieu; to him even the princes of the blood had to yield; and Henry of Condé sought with the rest to win the cardinal’s favour. Enghien was forced to conform. ”
