The Roman triumph (triumphus) was a civil ceremony and religious rite of ancient Rome, held to publicly celebrate and sanctify the military achievement of an army commander who had won great military successes, or originally and traditionally, one who had successfully completed a foreign war. In Republican tradition, only the Senate could grant a triumph. The origins and development of this honour were obscure: Roman historians placed the first triumph in the mythical past.

On the day of his triumph, the general wore regalia that identified him as near-divine or near-kingly. He rode in a chariot through the streets of Rome in unarmed procession with his army and the spoils of his war. At Jupiter's temple on the Capitoline Hill he offered sacrifice and the tokens of his victory to the god. Thereafter he had the right to be described as vir triumphalis ("man of triumph", later known as triumphator) for the rest of his life. After death, he was represented at his own funeral, and those of his later descendants, by a hired actor who wore his death mask (imago) and was clad in the all-purple, gold-embroidered triumphal toga picta ("painted" toga).

Gaius Julius Caesar (Classical Latin: [ˈɡaː.i.ʊs ˈjuː.lɪ.ʊs ˈkaj.sar], July 100 BC – 15 March 44 BC) was a Roman general and statesman and a distinguished writer of Latin prose. He played a critical role in the gradual transformation of the Roman Republic into the Roman Empire.

In 60 BC, Caesar, Crassus and Pompey formed a political alliance that was to dominate Roman politics for several years. Their attempts to amass power through populist tactics were opposed by the conservative elite within the Roman Senate^{[citation needed]}, among them Cato the Younger with the frequent support of Cicero. Caesar's conquest of Gaul, completed by 51 BC, extended Rome's territory to the English Channel and the Rhine. Caesar became the first Roman general to cross both when he built a bridge across the Rhine and conducted the first invasion of Britain.

These achievements granted him unmatched military power and threatened to eclipse Pompey's standing. The balance of power was further upset by the death of Crassus in 53 BC. Political realignments in Rome finally led to a standoff between Caesar and Pompey, the latter having taken up the cause of the Senate. Ordered by the Senate to stand trial in Rome for various charges, Caesar marched on Rome with one legion—legio XIII—from Gaul to Italy, crossing the Rubicon in 49 BC. This sparked a civil war from which he emerged as the unrivaled leader of the Roman world.