Complex sentence: The Passamaquoddy had a purely oral history before the arrival of Europeans, and occupied coastal regions along the Bay of Fundy, Passamaquoddy Bay and Gulf of Maine and along the St. Croix River and its tributaries.
Split into simpler sentences: The Passamaquoddy had a purely oral history before the arrival of Europeans. They occupied coastal regions along the Bay of Fundy, Passamaquoddy Bay and Gulf of Maine and along the St. Croix River and its tributaries.