On August 15, 1914, the cavalry screen was withdrawn, and four German army corps were revealed to the surprised Belgian line. In this emergency, clearly their only hope lay with the French. In Louvain, Brussels, and Antwerp, anxious questions lay on all lips. "Why do not the French hasten to our aid? When will they come? Will the British fail us at the twelfth hour?" Eager watchers at Ostend beheld no sign of the promised transports to disembark a British army of support in the day of overwhelming need. About this time some French cavalry crossed the Sambre to join hands with the Belgian right wing near Waterloo. But it was little more than a detachment. The French General Staff was occupied with a realignment, and had decided not to advance into Belgium until they could do so in force sufficient to cope with the Germans. The Belgian General Staff saw there was no other course but to fall back, fighting rear-guard actions until the longed-for French army was heralded by the thunder of friendly guns. The Belgian army was thus withdrawn from the River Gethe to hold Aerschot on its left stubbornly through August 14, 1914. Diest, St. Trond, and Waremme fell before the German tidal wave without resistance. Von Kluck's main army endeavored to sweep around the Belgian right at Wavre, but was checked for a brief space. * * * * * CHAPTER IV CAPTURE OF LOUVAIN--SURRENDER OF BRUSSELS During August 17, 1914, the German center was hurled forward in irresistible strength. The citizens of the villages in its path fled precipitously along the roads to Brussels. At intersections all kinds of vehicles bearing household effects, together with live stock, blocked the way to safety. The uhlan had become a terror, but not without some provocation. Tirlemont was bombarded, reduced, and evacuated by the Belgian troops. The latter made a vigorous defensive immediately before Louvain, but their weakness in artillery and numbers could not withstand the overwhelming superiority of the Germans. They were thrust back from the valley of the Dyle to begin their retreat on Antwerp, chiefly by way of Malines. This was to elude a successful German envelopment on their Louvain right. They retired in good order, but their losses had been considerable. This body was the Belgian right wing, which fell back to take up a position before Louvain. Here it fought a well-sustained action on August 19, 1914, the purpose of which was to cover the retreat of the main army by way of Malines on Antwerp. The Belgian right wing thus became a rear guard.