It taxed the crud out of people, while instilling fear in them.
This made it wealthy and influential.
1. What was the cause of World War 2?
C. The British and French policy of appeasement.
2. The events that led to the outbreak of World War 2 in Europe began with German troops occupying the Rhineland and ended with the German invasion of Poland. Which event occurred in between?
D. Hitler annexed Austria to the German Reich.
As we know....the Roman Empire was very, very successful.....but if we look closely; I believe it's quite easy to distinguish by which means the Roman Empire used to grow. Rome just loved to war aka conquest other countries...it would use its resources and force them to pay tributaries (payment to the person whom conquered them). They had an incredibly good army..their military techniques were incredibly smart..and they also had war machines; which greatly contributed to their power on the battlefield. As far as I know, Rome rarely made alliances and agreements...Christianity was after the fall of Rome.
This being said to expand and grow, it's quite obvious that the Roman Empire went on conquests and war to expand and thrive. Alas, all Empires fall...as did the might Roman Empire.
Thus, your answer.