The domestici rose to prominence during the Crisis of the 3rd Century,[1] the myriad of societal catastrophes nearly led to the collapse of the Roman Empire.
The accession of Diocletian and his subsequent reforms ended the continual strife and unstable leadership Ancient Rome had faced during this period.
The domesticus provided defined leadership in the military as officers; oversaw individual households and lands to protect common civilians and servants; and served as palace troops assigned to the emperor himself—all to prevent further crises in the future and transitioning into later periods of the Roman Empire.
These emperors were the ones that did realize, because of their military experience, that it was not possible to sustain the size of the late Roman Empire leading to them continuing Diocletian's idea to have it separated into the eastern and western halves.
Under the rule of the Byzantine Emperor Anastasius I, the successor to Zeno, the title of Domesticus began evolving and was often used as synonyms of Vicarius and Locoservator.