Final answer:
Tenskwatawa led the Indian forces against Governor Harrison in the Battle of Tippecanoe while his brother Tecumseh was away.
Step-by-step explanation:
The Indian forces against Governor Harrison in the Battle of Tippecanoe were led by Tenskwatawa, also known as the Prophet. Although his brother Tecumseh was the primary military leader and driving force behind the resistance to American expansion, he was away in the South at the time of the battle. The conflict resulted in the defeat of Tenskwatawa's forces and the destruction of Prophetstown, a loss that led to the decline of his influence and the Native American alliance he and Tecumseh worked to build.