Simplify the following text for a Grade 9 native English-speaking person.
Original: Finally , in 1861 parts of Burke County , Caldwell County , McDowell County , Watauga County , and Yancey County were combined to form Mitchell County .
Simplified: And in 1861 parts of Burke County , Caldwell County , McDowell County , Watauga County , and Yancey County were made into Mitchell County .