Question

How did the Roman government maintain control over conquered territories?

Answer 1

They left the leaders of the areas they took over in charge so it was less area they had to rule.

The administrative power, martial prowess, and financial might of the Roman Empire repudiated its modest commencements on the shores of the Tiber River. By 400 CE, Rome controlled almost 20 percent of the world's inhabitants. To rule the sprawling domain strongly, the Romans had to determine how to appease the communities they vanquished and persuade them to strive for the advantage of the Empire. If they could not direct authority over diverse peoples in faraway places, the Empire would break and fall.

Answer 2

They left the leaders of the areas they took over in charge so it was less area they had to rule.