The German staff, however, had other plans. At Liege they had rashly endeavored to storm a strong fortress by a massed infantry attack, which had failed disastrously until their new Krupp siege guns had been brought up. These quickly demolished the defenses. These siege guns, therefore, which had thus fully demonstrated their value against fortifications soon brought about the total defeat of the French offensive, and compelled the Allies to retreat from Belgium and northern France. The Germans lost no time in investing Namur, and on Saturday, as noted above, August 22, 1914, the fortress fell into the invaders' hands.

On the same day, August 22, 1914, the Fifth French Army, under the lead of General Lanrezac, was enduring the double stress of Von Bülow's army thundering against its front, and Von Hausen's two army corps pressing hard upon its right flank and rear, threatening its line of retreat. Against such terrific odds the French line at Dinant and Givet broke, exposing the flank and rear of the whole army; and by the evening of that day, August 22, the passages of the River Sambre, near Charleroi, had been forced, and the Fifth Army was falling back, contesting every mile of the ground with desperate rear-guard action. The British, meanwhile, defending the Mons position, were in grave danger of being cut off, enveloped, and destroyed.

Sir John French had put his two army corps into battle array. He had about thirty miles of front to defend, with Mons nearly in the center.

On Sunday afternoon, August 23, 1914, the full weight of the German onset fell for the first time upon the British.

All that night the British were under the fire of German artillery.

Sir John French realized the danger of his Maubeuge-Jenlain position, and on Monday evening, August 23, 1914, realizing the importance of putting a substantial barrier, such as the Somme or the Oise, between his force and the enemy, gave orders for the retirement to be continued at five o'clock the next morning, August 24, 1914. He had decided upon a new position about the town of Le Cateau, east of Cambrai. Before dawn, August 25, 1914, the southward march over rough, hilly country was resumed, and toward evening of August 25, 1914, after a long, hard day's fighting march over the highroads, in midsummer heat and thundershowers, the Guards Brigade and other regiments of the Second Corps, wet and weary, arrived at the little market town of Landrecies. From Landrecies, after an encounter with a German column, they marched south toward Wassigny on Guise.

BATTLE OF MONS AND RETREAT OF ALLIED ARMIES

While the night attack on Landrecies was raging, the Germans, taxing their men to the uttermost, marched four other corps through the tract of country between the west side of the forest and the road from Valenciennes to Cambrai. These corps were in a position along Smith-Dorrien's front before dawn of Wednesday, August, 26, 1914, and in the earliest hours of the morning it became apparent that the Germans were determined to throw the bulk of their strength against the British battalions which had moved up to a position south of the small town of Solesmes, extending to the south of Cambrai. Thus placed, this force could shield the Second Corps, now beginning its retreat under pressure of the German army advancing from Tournai. These troops under General Snow were destined to play an important part in the impending battle of Le Cateau.

By sunrise the guns of the four German corps were firing from positions facing the British left, and gray-green masses of infantry were pressing forward in dense firing lines. In view of this attack, General Smith-Dorrien judged it impossible to continue his retreat at daybreak. The First Corps was at that moment scarcely out of difficulty, and General Sordêt—whose troops had been fighting hard on the flank of the Fifth French Army, with General Lanrezac, against General von Bülow's hosts—was unable to help the British, owing to the exhausted state of his cavalry. The situation was full of peril; indeed, Wednesday bade fair to become the most critical day of the retreat.

As the day of August 26, 1914, wore on, General von Kluck, abandoning frontal attacks, began to use his superior numbers in a great enveloping move on both flanks, and some of his batteries secured positions from which they could enfilade the British line. Smith-Dorrien, having no available reserves, was thus virtually ringed by enemy guns on one side and by hostile infantry on all sides. "It became apparent," says Sir John French's dispatch, "that if complete annihilation was to be avoided, a retirement must be attempted; and the order was given to commence it about 3.30 p.m. The movement was covered with the most devoted intrepidity and determination by the artillery, which had suffered heavily, and the fine work done by the cavalry in the farther retreat from the position assisted materially in the completion of this difficult and dangerous operation. The saving of the left wing could never have been accomplished unless a commander" (Sir Horace Smith-Dorrien) "of rare coolness had been present to personally conduct the operation."