In the third century A.D., Rome faced many problems. They came both from within the empire and outside. Only drastic economy, military, and political reforms, it seemed, could hold off collapse.
Historians generally agreed that the end of the reign of the emperor Marcus Aurelius Marked the end of two centuries of peace and prosperity known as pax-Romana. The rulers that followed had little or no idea of how to deal with the giant empire and it's growing problems. As a result, Rome began to decline.
Hostile tribes outside the boundaries of the empire and pirates on the Mediterranean sea disrupted trade.Having reached their limit expansion Romans lacked new sources of gold and silver. Despite the revenue, the government raised taxes.
Agriculture faced an equally serious problem. Harvests in Italy and western Europe became increasingly meager because overworked soil has lost its fertility. Years of war destroyed much farmland. Eventually, food shortage and disease spread, and the population declined.
The Roman military was also in disarray. Over time Roman soldiers, in general, had become less disciplined and loyal. They gave their allegiance not to Rome but to their commander who fought each other for the throne.
This Empire is soon going mine there is no way I will let him take it from me