[1] In 1731, the governor of New France, because of his concerns about the behavior of the Iroquois and the English colonies to the south, ordered the reconstruction of forts along the Richelieu.

Because of English threats from the south, commander Vassant was asked to build a new fort at Sainte Thérèse in 1747, and posted several regiments.

However, what was left of Fort Sainte-Thérèse was used to stock merchandise during the British invasion of (1756–1759), until it was finally burned by major Robert Rogers and his men in 1760.

[2] During the British campaign on Montreal during the summer of 1760 the French and Canadiens sent soldiers to Fort Sainte Thérèse.

But around 2000, a well-known historian of the Richelieu Valley, Réal Fortin, along with Parks Canada, developed the hypothesis that it was situated on the south side of Point Portage facing the island of Sainte Marie.

[6] Reconstructing the deeds of the forts in the area, Fortin concluded that its location was lot 343 in the city of Carignan, on the west side of the Richelieu.

Subsequently, in November 2007, came a discovery: an aerial photograph taken in 1938, which showed the clear outline of the west side of the fort's remains (at 45.389111, -73.257515).