The German General Staff knew that Russia was arming several hundred thousand new troops, that Great Britain had reenforced her armies on the Continent, that the Allies were amply supplied with guns and shells, and that in the spring they would undertake an offensive on a large scale that would go far toward ending the war. In order to anticipate this threatened onslaught the German staff decided to strike, hoping to gain a victory before the Allies were entirely ready. Having arrived at this decision, the next problem was to select the battle field, and Verdun was decided upon. At first this choice created general astonishment, for the capture of Verdun would only mean the gaining of a certain number of square miles of territory. But the German staff believed that the capture of the ancient fortress of Verdun would have a powerful effect on public opinion at home and abroad. As a military operation they were confident that such a victory might have a decisive effect on the future of the war. It was hoped that the French army, already weakened, would receive a crushing blow from which it could never recover. An intelligent German prisoner explained the German point of view: "Verdun sticks into our side like a dagger, though sheathed. With that weapon threatening our vitals, how can we think of rushing on France elsewhere? If we had done so, the Verdun dagger might have stabbed us in the back as well as in the side." In order to sustain the German people's faith in the Hohenzollern dynasty there was urgent necessity that the crown prince should gain a success. The capture of Verdun would reestablish his somewhat tarnished military reputation and might force an exhausted France to sue for peace. The loss of Verdun and its girdle of forts would have made the situation of the defenders very difficult, they would find it a serious problem to hold back the German hosts while organizing a new line of defense from St. Mihiel to Ste. Menehould. Moreover as the German lines formed a semicircle around the French position at Verdun an immense number of guns could be massed against a small area. In the matter of railway facilities the Germans had every advantage. They possessed fourteen strategic lines, while the French had only one ordinary double line, which was in easy range of the German guns south of Vauquois, and a narrow gauge from Verdun to Bar-le-Duc. This terrible handicap was in time overcome by the French, who brought to perfection a system of motor transport by road that enabled them at a moment's notice to bring up men, ammunition, and supplies to the defense of Verdun.