Transalpine Gaul , Latin Gallia Transalpina , in Roman antiquity, the country bounded by the Alps, the Mediterranean, the Pyrenees, the Atlantic, and the Rhine is limited. It included today's France and Belgium and parts Germany , the Netherlands and the Switzerland .
The Romans ventured 121 v. BC First time to Transalpine Gaul to subdue the Celtic tribes along the Mediterranean coast. The whole of Transalpine Gaul was Gallic Wars (58–50 v . Ch. ) Annexed by Julius Caesar . Augustus later divided Transalpine Gaul into four provinces. Narbonensis on the Mediterranean became a senatorial Province with stronger cultural and political ties to Italy than the rest of Gaul. The remaining area has been invoked Gallia Comata; Augustus divided it into three imperial provinces - Belgica, Lugdunensis and Aquitania.