Final answer:
During negotiations with William Henry Harrison in 1810, Native American leaders like Tecumseh and Tenskwatawa demanded respect for their sovereignty and opposed the sale of lands without the consensus of all tribes.
Step-by-step explanation:
Native American leaders, especially Tecumseh and Tenskwatawa, engaged in negotiations with William Henry Harrison, then-governor of the Indiana Territory, in 1810. They sought to address issues regarding the ownership and sale of their lands. They were particularly opposed to the sale of lands, arguing that no single tribe had the authority to sell land without the consensus of all tribes since no one tribe owned the land individually. Tecumseh emerged as a strong voice against the treaties that had been signed by other tribes with the Americans, which ceded significant portions of land in Ohio and Indiana. He considered these agreements illegitimate and spoke of taking drastic measures against those tribal chiefs who signed them as well as against Harrison himself. This tension and opposition were rooted in a desire to preserve Native lands and sovereignty against the increasing pressure from American settlers.