AuxiliaThe Auxilia (au̯kˈs̠ɪlia, lit. "auxiliaries") were introduced as non-citizen troops attached to the citizen legions by Augustus after his reorganisation of the Imperial Roman army from 27 BC. By the 2nd century, the Auxilia contained the same number of infantry as the legions and, in addition, provided almost all of the Roman army's cavalry (especially light cavalry and archers) and more specialised troops. The auxilia thus represented three-fifths of Rome's regular land forces at that time.
Germania SuperiorGermania Superior ("Upper Germania") was an imperial province of the Roman Empire. It comprised an area of today's western Switzerland, the French Jura and Alsace regions, and southwestern Germany. Important cities were Besançon (Vesontio), Strasbourg (Argentoratum), Wiesbaden (Aquae Mattiacae), and Germania Superior's capital, Mainz (Mogontiacum). It comprised the Middle Rhine, bordering on the Limes Germanicus, and on the Alpine province of Raetia to the south-east.
Germania InferiorGermania Inferior ("Lower Germania") was a Roman province from AD 85 until the province was renamed Germania Secunda in the 4th century AD, on the west bank of the Rhine bordering the North Sea. The capital of the province was Colonia Claudia Ara Agrippinensium (modern-day Cologne). According to Ptolemy (2.9), Germania Inferior included the Rhine from its mouth up to the mouth of the Obringa, a river identified with either the Aar or the Moselle.
GermaniaGermania (dʒərˈmeɪni.ə ; ɡɛrˈmaːni.a), also called Magna Germania (English: Great Germania), Germania Libera (English: Free Germania), or Germanic Barbaricum to distinguish it from the Roman province of the same name, was a historical region in north-central Europe during the Roman era, which was associated by Roman authors with the Germanic peoples. The region stretched roughly from the Middle and Lower Rhine in the west to the Vistula in the east.
RhineThe Rhine (raɪn ) is one of the major European rivers. The river begins in the Swiss canton of Graubünden in the southeastern Swiss Alps. It forms part of the Swiss-Liechtenstein, Swiss-Austrian, and Swiss-German borders. After that the Rhine defines much of the Franco-German border, after which it flows in a mostly northerly direction through the German Rhineland. Finally in Germany, the Rhine turns into a predominantly westerly direction and flows into the Netherlands where it eventually empties into the North Sea.