Which person attempted to unite the native American of the old northwest?

Tecumseh, a Shawnee leader, attempted to unite the Native American tribes of the Old Northwest in the early 19th century. He sought to form a confederation to resist the encroachment of settlers on their lands, promoting a collective identity among various tribes. Tecumseh's efforts were aimed at preserving their territories and cultures in the face of increasing American expansion. His movement gained significant attention and support, though it ultimately faced challenges and setbacks.