Rome was able to establish its empire in large part by granting citizenship to many of the people it invaded. Military expansion fueled economic growth, taking enslaved people and plunder back to Rome, transforming the city and Roman society.
Rome was able to gain its empire in large part by extending some form of citizenship to many of the people it conquered.
Explanation:
Military expansion drove economic development, bringing enslaved people and loot back to Rome, which in turn transformed the city of Rome and Roman culture.
Because iron and steel-making at the time consumed more coal than iron ore, the steel mills moved closer to the coal mines to minimize transportation costs
