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Gaius Julius Caesar (13 July 100 BC – 15 March 44 BC) known by his nomen and cognomen Julius Caesar, was a Roman politician, military general, and historian who played a critical role in the events that led to the demise of the Roman Republic and the rise of the Roman Empire.
Julius Caesar and his rise to power would be the inspiration for Edward Sallow to rename himself Caesar and form Caesar's Legion, using Julius Caesar's own Commentarii de Bello Gallico and Edward Gibbon's The History of the Decline and Fall of the Roman Empire.
In 60 BC, Caesar, Crassus and Pompey formed the First Triumvirate, a political alliance that dominated Roman politics for several years. Their attempts to amass power as Populares were opposed by the Optimates within the Roman Senate, among them Cato the Younger with the frequent support of Cicero. Caesar rose to become one of the most powerful politicians in the Roman Republic through a number of his accomplishments, notably his victories in the Gallic Wars, completed by 51 BC. During this time, Caesar became the first Roman general to cross both the English Channel and the Rhine River, when he built a bridge across the Rhine and crossed the Channel to invade Britain. Caesar's wars extended Rome's territory to Britain and past Gaul. These achievements granted him unmatched military power and threatened to eclipse the standing of Pompey, who had realigned himself with the Senate after the death of Crassus in 53 BC. With the Gallic Wars concluded, the Senate ordered Caesar to step down from his military command and return to Rome. Leaving his command in Gaul meant losing his immunity from being charged as a criminal for waging unsanctioned wars. As a result, Caesar found himself with no other options but to cross the Rubicon with the 13th Legion, leaving his province and illegally entering Roman Italy underarms. This began Caesar's civil war, and his victory in the war put him in an unrivaled position of power and influence.
After assuming control of the government, Caesar began a program of social and governmental reforms, including the creation of the Julian calendar. He gave citizenship to many residents of far regions of the Roman Empire. He initiated land reform and support for veterans. He centralized the bureaucracy of the Republic and was eventually proclaimed "dictator for life" (Latin: "dictator perpetuo"), giving him additional authority. His populist and authoritarian reforms angered the elites, who began to conspire against him. On the Ides of March (15 March), 44 BC, Caesar was assassinated by a group of rebellious senators led by Gaius Cassius Longinus, Marcus Junius Brutus, and Decimus Junius Brutus, who stabbed him to death.
Gaius Julius Caesar is mentioned only in Fallout: New Vegas.