Complex sentence: Some historians consider him a role model for the younger Tecumseh, who was a member of a band of Shawnee living with the Chickamauga/Lower Cherokee and taking part in their wars.
Split into simpler sentences: Some historians consider him a role model for the younger Tecumseh. He was a member of a band of Shawnee living with the Chickamauga/Lower Cherokee and taking part in their wars.