Final answer:
The 1805 and 1806 expeditions of Zebulon Pike led to American interest and settlement in the southwest, especially in Texas.
Step-by-step explanation:
The 1805 and 1806 expeditions of Zebulon Pike led to American interest and settlement in the southwest, especially in Texas. These expeditions were not directly related to finding a water route to the Pacific Ocean or the settlement of land just east of the Mississippi River. Thomas Jefferson appointed Meriwether Lewis and William Clark to lead an expedition to explore the western lands and discover trade routes. Their journey was aimed at finding commercial possibilities and mapping the territory.