Simplify the following text for a Grade 6 native English-speaking person.
Original: The counties ' boundaries were created by the Georgia General Assembly on June 9 , 1826 , but they were not named until December 14 , 1826 .
Simplified: The counties ' area were created by the Georgia General Assembly on June 9 , 1826 . They were not named until December 14 , 1826 .