Julius Caesar. Julius Caesar, one of Ancient Rome’s most famous individuals, was born in 100 BC – or near to that year. Julius Caesar joined the Roman Army in 81 BC and was the first Roman army commander to invade England which he did in 55 BC and again in 54 BC.Caesar was born into a wealthy family and he was a well educated child who was good at sport.After serving in the Roman Army, Caesar developed an interest in politics.n 44 BC, Caesar was murdered by those politicians who feared that he was too obsessed with his own importance. His murder took place at the Senate House in Rome. After his murder, Rome was divided as to whether it was a good thing or not.