"He built a second capital in the East, which led to the division of the Empire" would be the best way to describe how Diocletian affected the Roman Empire, since it had grown to a state where managing it under a single entity was too difficult.
I would love to help but is there answer choices
Well do you have the answer choices? Or don't tell me your howling monkey a-ss. wants me to think so I can do the work for you