Complex sentence: In 1816 Ross settled at the site along the Tennessee River above Chattanooga Creek and established Ross's Landing as a trading post on the northern border of the Cherokee Nation, across the river from the United States of America.
Split into simpler sentences: In 1816 Ross settled at the site along the Tennessee River above Chattanooga Creek. There he established a trading post on the northern border of the Cherokee Nation, across the river from the United States of America.