Complex sentence: In the twenty years following their move from North Carolina and Ben's birth, they lived in eastern Tennessee, Alabama, and then western Tennessee, finally settling at Dyersburg, where one of their closest neighbors was David Crockett--a great influence on young Ben.
Split into simpler sentences: In the twenty years following their move from North Carolina and Ben's birth, they lived in eastern Tennessee, Alabama, and then western Tennessee. They finally settled at Dyersburg, where one of their closest neighbors was David Crockett, a great influence on young Ben.