Complex sentence: They were referred to in treaties as the Wea on the Wabash, the Wabash Wea, and in history as the Wabash Confederacy or the Wabash Indians.
Split into simpler sentences: They were referred to in treaties as the Wea on the Wabash, or the Wabash Wea. In historical records, they have been called the Wabash Confederacy or the Wabash Indians.