Simplify the following text for a Grade 9 native English-speaking person.
Original: In 1596 Saxe-Coburg-Eisenach was split , John Casimir got Saxe-Coburg while John Ernest received Saxe-Eisenach .
Simplified: In 1596 Saxe-Coburg-Eisenach was split , Johann Casimir got Saxe-Coburg and Johann Ernst got Saxe-Eisenach .