A final factor in setting the right tone is to determine the purpose of the essay. An author's purpose is the reason for writing. There are three main types of author's purpose: to persuade, to inform or to entertain. If you are trying to convince your reader to believe or to do something, then you are persuading.
Caesar ignored them and at the Battle of Munda, defeated Pompey. There were many civil wars during Rome in the first century B.C., as many high-ranking patricians such as consuls fought to be more powerful than each other.
Caesar defeats the Nervii The following year (57 BC) Caesar marched his troops northwards to deal with the Belgae. The Nervii were the leading tribe of the Celtic Belgae and were apparently preparing to attack the Roman forces, as they feared Caesar might otherwise conquer all of Gaul.