Justinian l devastated the manpower reserves and the long-term maintenance of the army beginning the empire 's long decline until its conquest by the Turks in 1453 .
He devastated the manpower reserves and the long-term maintenance of the army , beginning the empire 's long decline until its conquest by the Turks in 1453.Because of his restoration activities , Justinian has sometimes been known as the `` last Roman '' in mid 20th century historiography .
Justinian I