1. Britain: The Roman Empire conquered and annexed Britain in the 1st century CE. The province of Britannia was established and extended from Cornwall in the southwest to the Antonine Wall in Scotland.
2. Northern Africa: The Romans expanded their control over Northern Africa during the Pax Romana. The region included the provinces of Africa Proconsularis, Numidia, and Mauretania.
3. Middle East: The Roman Empire expanded into the Middle East, conquering and incorporating Judea, Syria, and parts of Armenia.
4. Danube Frontier: The Romans established and maintained the Danube River as their northern frontier in Europe, with a series of fortifications and military posts.
5. Rhine Frontier: The Rhine River marked the western boundary of the Roman Empire in Europe during the Pax Romana.
6. Balkans: The Roman Empire controlled the Balkans, which included the provinces of Illyricum and Moesia.
7. Gaul: Gaul (present-day France) was conquered by the Romans during the Pax Romana and divided into several provinces, including Gallia Aquitania, Gallia Belgica, and Gallia Narbonensis.
8. Hispania: The Iberian Peninsula (present-day Spain and Portugal) was incorporated into the Roman Empire and divided into the provinces of Hispania Tarraconensis, Hispania Baetica, and Hispania Carthaginensis.