Tales Of The Camp by Sir Arthur Conan Doyle

It was in the days when the German armies had broken their way across France, and when the shattered forces of the young Republic had been swept away to the north of the Aisne and to the south of the Loire. Three broad streams of armed men had rolled slowly but irresistibly from the Rhine, now meandering to the north, now to the south, dividing, coalescing, but all uniting to form one great lake round Paris. And from this lake there welled out smaller streams, one to the north, one southward to Orleans, and a third westward to Normandy. Many a German trooper saw the sea for the first time when he rode his horse girth-deep into the waves at Dieppe.

Black and bitter were the thoughts of Frenchmen when they saw this weal of dishonour slashed across the fair face of their country. They had fought and they had been overborne. That swarming cavalry, those countless footmen, the masterful guns--they had tried and tried to make head against them. In battalions their invaders were not to be beaten; but man to man, or ten to ten, they were their equals. A brave Frenchman might still make a single German rue the day that he had left his own bank of the Rhine. Thus, unchronicled amid the battles and the sieges, there broke out another war, a war of individuals, with foul murder upon the one side and brutal reprisal on the other.