I assume your talking about the HUNS... When the empire split in two the east had more gold and more resources and the dying west had to suffer all the barbarian attacks like the huns... The East quite simply was more prepared and had more walls and guards to defend their border also the Eastern Empire had the river danube north of them which helped deflect the Hunnic invasions and other barbarian invasion more west...
A "seniority system" is an employment system that allots to employees rights and benefits according to the length of their employment. The principal feature of all seniority systems is time.
America helped Russia and Japan in the world war I. Therefore America emerged as the most powerful country in the world. America had power of Foreighn policies and had a much stronger effect after the shock of unexpected world war II.
