No more could be done with the forces at his disposal, and the German masses of infantry were pouring across the Meuse at Visé, towards Liège by Verviers, up the right bank of the Meuse towards Namur, and farther south through the Ardennes. The German cavalry which spread over the country east and north-east of Brussels and was sometimes repulsed by the Belgians, was merely a screen, which defective air-work failed to penetrate, and the frequent engagements were merely the brushes of outposts. Within a week from the fall of Fort Loncin half of Belgium was overrun and the real menace revealed. Belgium was powerless before the avalanche, and its only hope lay in France. But the French Army was still mobilizing on its northern front, and its incursions into Alsace and Lorraine did nothing to relieve the pressure. The Belgians had to fall back towards Antwerp, uncovering Brussels, which was occupied by the Germans on the 20th and mulcted in a preliminary levy of eight million pounds, and leaving to the fortifications of Namur the task of barring the German advance to the northern frontiers of France. Namur proved a broken reed. The troops which paraded through Brussels with impressive pomp and regularity were only a detail of the extreme right wing of the invading force; the mass was advancing along the north bank of the Meuse and overrunning the whole of Belgium south and east of the river. On the 15th an attempt to seize Dinant and the river crossing above Namur was repulsed by French artillery; but there was apparently no cavalry to follow up this success, and the Germans were allowed to bring up their heavy howitzers for the bombardment of Namur without disturbance. It began on the 20th, and, unsupported by the Allied assistance for which they looked, the Belgians were panic-stricken; on the 23rd the city and most of the forts were in German hands though two resisted until the 26th. The Germans had not, as at Liège, wasted their infantry in premature attacks, and with little loss to them, a fortress reputed impregnable had been captured, the greater part of the southern Belgian Army destroyed, and the provisional plan of French defence frustrated. The fall of Namur was the first resounding success of the Germans in the war.