The Roman army expanded its power by conquering the Etruscans and other Greek city-states in the south.Romans established an empire around the Mediterranean Sea.
Their conquest in the Peninsula brought contact with another rival which are the Carthage. This rivalry led to the Punic Wars. Rome inherited the rivalry of the Greeks and the Carthage. The Greek city-state in Southern Italy was conquered by Rome
Rome built a navy. Romans defeated the Carthaginians. They were made to pay a tribute of grains.
Hannibal attacked Saguntum in Spain, an ally of Rome. But to his knowledge, Romans rushed to invade North Africa. In the battle of Zama, Hannibal was defeated.
After the Punic Wars, Rome moved to conquer more lands in Middle East and Egypt. Other provinces also allied to Rome. Then it became Roman Provinces. Almost every land around Mediterranean was under Rome
Violence and civil war divided Rome, factors were corruption in government, poverty and unemployment.
But when Sulla was appointed, peace was restored in Rome.