It would be no easy task to make a map of Germany in the time of Charles V sufficiently detailed to show all the states and scattered fragments of states. If, for example, the accompanying map were much larger and indicated all the divisions, it would be seen that the territory of the city of Ulm completely surrounded the microscopic possessions of a certain knight, the lord of Eybach, and two districts belonging to the abbot of Elchingen. On its borders lay the territories of four knights,--the lords of Rechberg, Stotzingen, Erbach, and Wiesensteig,--and of the abbots of Söflingen and Wiblingen, besides portions of Würtemberg and outlying Austrian possessions. The main cause of this bewildering subdivision of Germany was the habit of dealing with a principality as if it were merely private property which might be divided up among several children, or disposed of piecemeal, quite regardless of the wishes of the inhabitants. [Sidenote: No central power to maintain order.] [Sidenote: Neighborhood war.] It is clear that these states, little and big, all tangled up with one another, would be sure to have disputes among themselves which would have to be settled in some way. It would appear to have been absolutely necessary under the circumstances that there should be some superior court or judge to adjust differences between the many members of the empire, as well as a military or police force to carry out the will of the tribunal, should one of the parties concerned resist its decrees. But although there was an imperial court, it followed the emperor about and was therefore hard to get at. Moreover, even if a decision was obtained from it, there was no way for the aggrieved party to secure the execution of the judgment, for the emperor had no force sufficient to coerce the larger states. The natural result was a resort to self-help. Neighborhood war was permitted by law if only some courteous preliminaries were observed. For instance, a prince or town was required to give warning three days in advance before attacking another member of the empire.[265] [Sidenote: The German diet.] [Sidenote: Effort to better the German government.]