The need for extraordinary and decisive action :D
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...
The Triple Entente, also known as the Allies, consisted of "<span>France, Great Britain, and Russia" since this was the major power structure that was in place at the outbreak of war in 1914. </span>
