Which explorer played a significant role in claiming territory for France in the New World?

Rene Robert Cavelier de la Salle is significant in the history of French exploration in the New World, particularly due to his role in claiming the vast territory of Louisiana for France. In the late 17th century, La Salle embarked on a mission to explore the Mississippi River and its tributaries, and he reached the mouth of the river in 1682. There, he famously proclaimed the region for King Louis XIV of France, naming it "La Louisiane" in honor of the king. This claim formed the foundation for French territories in North America, which would have lasting implications for the history and development of the region.

His explorations facilitated the further expansion of French influence and settlement in the New World, laying the groundwork for future missions, alliances, and conflicts in the area. The other figures mentioned may have contributed to the administration or governance of French territories, but La Salle’s exploration and claim of Louisiana were crucial turning points in establishing France's presence in North America.