The wars of conquest eventually created serious political problems for the Romans. When the soldiers returned home, they found their farms practically in ruins. Many were forced to sell their land to ready buyers who had grown rich from the wars. These wealthy men created huge estates called latifundia. Now landless, veterans moved to the cities, especially Rome, but could not find work. These developments not only created unrest in the city but also threatened Rome’s army by reducing its ranks, because landless men, even if they were Romans and lived in Rome, were forbidden to serve in the Roman army. The landless veterans found a leader in Tiberius Gracchus (163–133 B.C.E.), an aristocrat who was appalled by the situation. He proposed dividing public land among the poor. But a group of wealthy senators murdered him, launching a long era of political violence that would destroy the republic. Still, Tiberius’s brother Gaius Gracchus (153–121 B.C.E.) passed a law providing the urban poor with cheap grain and urged practical reforms. Once again senators tried to stem the tide of reform by murdering him.

The next reformer, Gaius Marius (ca. 157–86 B.C.E.), recruited landless men into the army to put down a rebel king in Africa. He promised them land for their service. But after his victory, the Senate refused to honor his promise. From then on, Roman soldiers looked to their commanders, not to the Senate or the state, to protect their interests. Rome was also dividing into two political factions, both of which wanted political power. Both factions named individuals as supreme military commander and each led Roman troops against an external enemy but also against each other. One of these generals, Sulla, gained power in Rome, and in 81 B.C.E. the Senate made him dictator, an official office in the Roman Republic given to a man who was granted absolute power temporarily to handle emergencies such as war. Dictators were supposed to step down after six months, but Sulla held this position for nine years, and after that it was too late to restore the republican constitution.

The history of the late republic is the story of power struggles among many famous Roman figures against a background of unrest at home and military campaigns abroad. Pompey (PAHM-pee) used military victories in Spain to force the Senate to allow him to run for consul. In 59 B.C.E. he was joined in a political alliance called the First Triumvirate by Crassus, another ambitious politician and the wealthiest man in Rome, and by Julius Caesar (100–44 B.C.E.). Recognizing that military success led to power, Caesar led his troops to victory in Spain and Gaul, modern France. The First Triumvirate fell apart after Crassus was killed in battle in 53 B.C.E. while trying to conquer Parthia, leaving Caesar and Pompey in competition with each other for power. The result was civil war. The Ptolemaic rulers of Egypt became mixed up in this war, particularly Cleopatra VII, who allied herself with Caesar and had a son by him. (See “Individuals in Society: Queen Cleopatra.”) Caesar emerged victorious, and he began to make a number of legal and economic reforms, acting on his own authority, though often with the approval of the Senate, which he packed with his supporters. He issued laws about debt, the collection of taxes, and the distribution of grain and land. Roman allies in Italy were to have full citizenship. He founded new colonies, which were to be populated by veterans and the poor.

Caesar was wildly popular with most people in Rome, but some senators opposed his rise to what was becoming absolute power. In 44 B.C.E. a group of conspirators assassinated him and set off another round of civil war. His grandnephew, the eighteen-year-old Octavian (63 B.C.E.–14 C.E.), joined with two of Caesar’s followers, Marc Antony and Lepidus, in the Second Triumvirate. After defeating Caesar’s murderers, they had a falling-out. Octavian forced Lepidus out of office and waged war against Antony, who had now also become allied with Cleopatra. In 31 B.C.E. Octavian defeated the combined forces of Antony and Cleopatra at the Battle of Actium in Greece. His victory ended the age of civil war.