Samuel de Champlain's arrival at Tadoussac was a significant moment during his third voyage to New France, a region that he sought to develop as a French colony. This locale was strategically important due to its location at the meeting point of the Saint Lawrence River and the Saguenay River, making it an ideal spot for trade and defense. Champlain aimed to establish alliances with Indigenous populations, particularly the St. Lawrence Iroquois, to bolster the French fur trade and counteract the presence of rival European powers, particularly the English and Dutch.

Upon arriving, Champlain and his crew began the construction of fortifications, marking a crucial step in securing a foothold in North America. These fortifications were intended to offer protection against potential threats and served as a base for further explorations and expansions into the interior. Champlain understood the significance of military preparedness and reinforced relationships with local tribes to ensure mutual benefit and security in trade.

The fortifications at Tadoussac became a vital point for French exploration and fur trading operations. This establishment not only provided a refuge for the French but also illustrated their long-term intentions to colonize the region. The activities commenced by Champlain laid the groundwork for future settlements, the eventual founding of Quebec City, and the expansion of New France throughout Canada.