The origin of the Roman Empire dates back to 29 B.C. under the rule of Octavian and ends in 476 A.D. under the rule of Romulus Augustulus.From the crisis emerged as a winner Julius Caesar, conqueror of Gaul (now France, Belgium and Holland) and Egypt, who became into a dictator. In 44 B.C. he was assassinated by a group of senators, among them, men of his confidence, such as Brutus and Cassius.However, 17 years later, his grandnephew Octavian suppressed the republic and became emperor under the name of Caesar Augustus (27-14 BC). Vespasian inaugurated the Flavian dynasty, of plebeian origin.From 96 to 180 A.D. the so-called "five good emperors" ruled in what was considered the "silver age" of the empire. They brought Roman Empire to its height. The army, unsatisfied, imposed as emperor a general, Septimius Severus, who began the period called of military monarchy. Later, during the rest of the third century A.D., the emperors, named by their legions, succeeded each other in the period known as military anarchy.