the Belgians had been effectively masked by a corps detached
north-westwards from Brussels, that the Duke of Württemberg and Von
Hausen had troops enough to force the Meuse, drive in the French
right, and threaten the centre at Charleroi, and that Von Buelow could
cross the Sambre and Von Kluck encircle the British flank. The
strength which the Germans developed in Belgium and the extension of
their right wing are said to have been an afterthought due to the
intervention of the British Expeditionary Force; but the original
German plan required some such modification when the presence of
British troops lengthened the line of French defence.

The first two army corps, under Haig to the right and Smith-Dorrien to
the left, were in position on Saturday the 22nd hard at work throwing
up entrenchments and clearing the ground of obstacles to their fire.
That day was more eventful for the French, and it is not quite clear
why they were not assisted by a British offensive on their left. On
the right, the Third and Fourth French armies under Ruffey and Langle
de Cary had advanced from the Meuse to attack the Germans across the
Semois. They were severely checked and withdrew behind the Meuse,
while an unsuspected army of Saxons under Von Hausen attacked the
right flank of the Fifth French army under Lanrezac which lay along
the Sambre with its right flank resting on the Meuse. The fall of
Namur in the angle of the two rivers made Von Hausen's task
comparatively easy, and the Fifth army, which was also attacked by Von
Buelow in front, fell back in some confusion. A breach was thus made
in the French line, and Von Hausen turned left to roll up the Fourth
and Third armies of Langle de Cary and Ruffey; they, too, in their
turn retreated in some haste, and the Germans were free to concentrate
on the British. They had cleared their left and centre of danger, and
Von Kluck was able on the 23rd not only to face our troops with