I believe the answer is "change to meet the needs of a modern society".
Answer:
Why did Diocletian divide the empire into two sections?
Explanation:
He thought that dividing the empire would make it easier to rule. ... The soldiers hired on the frontiers were not willing to go defend other parts of the empire. Soldiers in the outer parts of the Roman Empire often supported local commanders instead of the emperor.
The Ottoman empire officially dissolved in 1923, creating the Republic of Turkey in its place.
Indians were pushed out further into the Great Plains, the war happened and more land was received