The Gallic Wars: The wars (58-51 BC) in which Julius Caesar conquered Gaul and defeated their leader Vercingetorix.
Tribe: A group of people, often of related families, who live together, sharing the same language, culture, and history.
Civil war: A war between two groups of people living in the same country.
Dictator: A ruler with absolute power, but who is not a monarch.
Augustus: The title that the Senate gave to Octavian, meaning "the Exalted" or "the Reverend."
Emperor: A monarch who rules an empire (derived from the Latin imperator).
Pax Romana: "Roman Peace." A period of relative peace and stability within the Roman Empire during the first and second centuries AD.
Denarius: The most common silver coin used in the Roman Empire. Plural: denarii
Limes: the northern border of the Roman Empire.
Romanisation: The process where conquered peoples adopted Roman culture, language, and habits (becoming more like the Romans).
Alliance: An agreement between two or more parties to help each other (in this context, tribes providing soldiers in exchange for protection and rights).
Batavians: a Germanic tribe that lived in the modern-day Netherlands in the region that is now the "Betuwe".
Batavian Rebellion: The revolt (69 AD) against Rome fought by the Batavians.