Simplify the following text for a Grade 14 native English-speaking person.
Original: And though the opposition of interest , and the memory of a recent war , divided the empire into two great hostile powers , their mutual fears and the fading authority of Galerius produced an apparent tranquility in the imperial government .
Simplified: Although the memory of a recent war divided the empire into two great hostile powers , their fears and the fading authority of Galerius produced an apparent tranquility in the imperial government .