Gallia est omnis divisa in partes tres... It is, perhaps, the most famous opening line of any memoir in Western civilization. What Caesar and the Romans called \"Gaul,\" although we usually think of it as France, also comprised Belgium, the German lands west of the Rhine, southern Holland, and much of Switzerland. This is the only military campaign of the ancient world for which we have a chronicle written by the general who conducted it, and Julius Caesar is an insightful historian, with a keen eye for detail. This commentary occurs during the years 58-50 B.C.