In 1664, the Marquis de Tracy was appointed viceroy of New France. From his base in Quebec City, he initiated a brutal war against the Iroquois peoples and after defeating them and destroying their crops and villages, he launched an attack against the Mohawk nation and causing destruction to their territory. Marquis Alexandre de Prouville de Tracy seized all the Mohawk lands in the name of the king of France, and forced the Mohawks to accept the Roman Cathoilic faith and to adopt the French language as taught by the Jesuit missionaries.
Marquis Alexandre de Prouville de Tracy died at his castle in France in 1670.
On a accusé, sans trop de preuves, Saint-Castin d’avoir eu plusieurs femmes, légitimes ou concubines, et d’avoir mené une vie de débauche au fond des forêts acadiennes.
On porta de nouveau des accusations contre lui et, malgré un rapport favorable du gouverneur de Brouillan [Monbeton], le baron décida de rentrer en France, pour se justifier et aussi pour mettre ordre (enfin !) à ses affaires personnelles.
Un autre garçon, Jean-Pierre, qui étudia au petit séminaire de Québec, mourut à l’âge de huit ans.