An acrimonious discussion has arisen as to whether he promised to come up and help Blucher shortly afterwards or not, but it is a discussion beside the mark, for, in the first place, Wellington quite certainly _intended_ to come up and help the Prussians; and in the second place, he was quite as certainly _unable_ to do so, for the French opposition under Ney which he had under-estimated, turned out to be a serious thing.

But his letter, and his undoubted intention to come up and help Blucher, depended upon his belief that the units of his army were all fairly close, and that by, say, half-past one he would have the whole lot occupying the heights of Quatre Bras.

Now, as a fact, the units of Wellington's command were scattered all over the place, and it is astonishing to note the discrepancy between his idea of their position and their real position on the morning of the day when Quatre Bras was fought. When one appreciates what that discrepancy was, one has a measure of the bad staff work that was being done under Wellington at the moment.

[Ill.u.s.tration]

The plan (p. 127)[12] distinguishes between the real positions of Wellington's command on the morning of the 16th when he was writing his letter to Blucher and the positions which Wellington, in that letter, erroneously ascribes to them. It will show the reader the wide difference there was between Wellington's idea of where his troops were and their actual position on that morning. It needs no comment. It is sufficient in itself to explain why the action at Quatre Bras consisted not in a set army meeting and repelling the French (it could have destroyed them as things turned out, seeing Erlon's absence), but in the perpetual arrival of separate and hurried units, which went on from midday almost until nightfall.

IV

THE ALLIED RETREAT AND FRENCH ADVANCE UPON WATERLOO AND WAVRE

When the Prussians had concentrated to meet Napoleon at Ligny they had managed to collect, in time for the battle, three out of their four army corps.

These three army corps were the First, the Second, and the Third, and, as we have just seen, they were defeated.

But, as we have also seen, they were not thoroughly defeated. They were not disorganised, still less were the bulk of them captured and disarmed.

Most important of all, they were free to retreat by any road that did not bring them against their victorious enemy. In other words, they were free to retreat to the north as well as to the east.

The full importance of this choice will, after the constant reiteration of it in the preceding pages, be clear to the reader. A retreat towards the east, and upon the line of communications which fed the Prussian army, would have had these two effects: First, it would have involved in the retirement that fresh Fourth Army Corps under Bulow which had not yet come into action, and which numbered no less than 32,000 men. For it lay to the east of the battlefield. In other words, that army corps would have been wasted, and the whole of the Prussian forces would have been forced out of the remainder of the campaign. Secondly, it would have finally separated Blucher and his Prussians from Wellington's command. The Duke, with his western half of the allied forces, would have had to stand up alone to the ma.s.s of Napoleon's army, which would, after the defeat of the Prussians at Ligny, naturally turn to the task of defeating the English General.

Now the fact of capital importance upon which the reader must concentrate if he is to grasp the issue of the campaign is the fact that the French staff fell into an error as to the true direction of the Prussian retreat.

Napoleon, Soult, and all the heads of the French army were convinced that the Prussian retreat _was_ being made by that eastern road.

As a fact, the Prussians, under the cover of darkness, had retired _not_ east but north.

The defeated army corps, the First, Second, and Third, did not fall back upon the fresh and unused Fourth Corps; they left it unhampered to march northward also; and all during the darkness the Prussian forces, as a whole, were marching in roughly parallel columns upon Wavre and its neighbourhood.

It was this escape to the north instead of the east that made it possible for the Prussians to effect their junction with Wellington upon the day of Waterloo; but it must not be imagined that this supremely fortunate decision to abandon the field of their defeat at Ligny in a northerly rather than an easterly direction was at first deliberately conceived by the Prussians with the particular object of effecting a junction with Wellington later on.

In the first place, the Prussians had no idea what line Wellington's retreat would take. They knew that he was particularly anxious about his communications with the sea, and quite as likely to move westward as northward when Napoleon should come against him.

The full historical truth, accurately stated, cannot be put into the formula, "The Prussians retreated northward in order to be able to join Wellington two days later at Waterloo." To state it so would be to read history backwards, and to presuppose in the Prussian staff a knowledge of the future. The true formula is rather as follows:--"The Prussians retired northward, and not eastward, because the incompleteness of their defeat permitted them to do so, and thus at once to avoid the waste of their Fourth Army Corps and to gain positions where they would be able, if necessity arose, to get news of what had happened to Wellington."

In other words, to retreat northwards, though the decision to do so depended only upon considerations of the most general kind, was wise strategy, and the opportunity for that piece of strategy was seized; but the retreat northwards was not undertaken with the specific object of at once rejoining Wellington.

It must further be pointed out that this retreat northwards, though it abandoned the fixed line of communications leading through Namur and Liege to Aix la Chapelle, would pick up in a very few miles another line of communications through Louvain, Maestricht, and Cologne. The Prussian commanders, in determining upon this northward march, were in no way risking their supply nor hazarding the existence of their army upon a great chance. They were taking advantage of one of two courses left open to them, and that one the wiser of the two.

This retreat upon Wavre was conducted with a precision and an endurance most remarkable when we consider the fact that it took place just after a severe, though not a decisive, defeat.

Of the eighty odd thousand Prussians engaged at Ligny, probably 12,000 had fallen, killed or wounded. When the Prussian centre broke, many units became totally disorganised; and, counting the prisoners and runaways who failed to rejoin the colours, we must accept as certainly not exaggerated the Prussian official report of a loss of 15,000.[13]

In spite, I say, of this severe defeat, the order of the retreat was well maintained, and was rewarded by an exceptional rapidity.

The First Corps marched along the westerly route that lay directly before them by Tilly and Mont St Guibert. They marched past Wavre itself, and bivouacked about midday of Sat.u.r.day the 17th, round about the village of Bierges, on the other side of the river Dyle.

The Second Corps followed the First, and ended its march on the southern side of Wavre, round about the village of St Anne.

The Third Corps did not complete the retreat until the end of daylight upon the 17th, and then marched through Wavre, across the river to the north, and bivouacked around La Bavette.

Finally, still later on the same evening, the Fourth Corps, that of Bulow, which had come to Ligny too late for the action, marching by the eastward lanes, through Sart and Corry, lay round Dion Le Mont.

By nightfall, therefore, on Sat.u.r.day the 17th of June, we have the ma.s.s of the Prussian army safe round Wavre, and duly disposed all round that town in perfect order.

With the exception of a rearguard, which did not come up until the morning of the Sunday, all had been safely withdrawn in the twenty-four hours that followed the defeat at Ligny.

It may be asked why this great movement had been permitted to take place without molestation from the victors.

[Ill.u.s.tration]

Napoleon would naturally, of course, after his defeat of the Prussians, withdraw to the west the greater part of the forces he had used against Blucher at Ligny and direct them towards the Brussels road in order to use them next against Wellington. But Napoleon had left behind him Grouchy in supreme command over a great body of troops, some 33,000 in all, whose business it was to follow up the Prussians, to find out what road they had taken; at the least to watch their movements, and at the best to cut off any isolated bodies or to give battle to any disjointed parts which the retreat might have separated from support. In general, Grouchy was to see to it that the Prussians did not return.

In this task Grouchy failed. True, he was not given his final instructions by the Emperor until nearly midday of the 17th, but a man up to his work would have discovered the line of the Prussian retreat and have hung on to it. Grouchy failed, partly because he was insufficiently provided with cavalry, partly because he was a man excellent only in a sudden tactical dilemma, incompetent in large strategical problems, partly because he mistrusted his subordinates, and they him; but most of all because of an original prepossession (under which, it is but fair to him to add, all the French leaders lay) that the Prussian retreat had taken the form of a flight towards Namur, along the eastern line of communications, while, as a fact, it had taken the form of a disciplined retreat upon Wavre and the north.

At ten o'clock in the evening of Sat.u.r.day the 17th, twenty-four hours after the battle of Ligny, and at the moment when the whole body of the Prussian forces was already reunited in an orderly circle round Wavre, Grouchy, twelve miles to the south of them, was beginning--but only beginning--to discover the truth. He wrote at that hour to the Emperor that "the Prussians had retired in several directions," one body towards Namur, another with Blucher the Commander-in-chief towards Liege, _and a third body apparently towards Wavre_. He even added that he was going to find out whether it might not be the larger of the three bodies which had gone towards Wavre, and he appreciated that whoever had gone towards Wavre intended keeping in touch with the rest of the Allies under Wellington.

But all that Grouchy did after writing this letter proves how little he, as yet, really believed that any great body of the enemy had marched on Wavre. He anxiously sent out, not northward, but eastward and north-eastward, to feel for what he believed to be the main body of the retreating foe.

During the night he did become finally convinced by the ma.s.s of evidence brought in by his scouts that round Wavre was the whole Prussian force, and the conclusion that he came to was singular! He took it for granted that through Wavre the Prussians certainly intended a full retreat on Brussels. He wrote at daybreak of the 18th of June that he was about to pursue them.

That Blucher could dream of taking a short cut westward, thus effecting an immediate junction with Wellington, never entered Grouchy's head. He did not put his army in motion until after having written this letter. He advanced his troops in a decent and leisurely manner up the Wavre road through the mid hours of the day, and himself, just before noon, wrote a dispatch to the Emperor; he wrote it from Sart, a point ten miles south of Wavre. In that letter he announced "his intention to be ma.s.sed at Wavre _that night_," and begging for "orders as to how he should begin his attack of the _next day_."

The next day! Monday!

Already, hours before--by midnight of Sat.u.r.day--Blucher had sent his message to Wellington a.s.suring him that the Prussians would come to his a.s.sistance upon Sunday, the morrow.

Even as Grouchy was writing, the Prussian Corps were streaming westward across country to appear upon Napoleon's flank four hours later and decide the campaign.

Having written his letter, Grouchy sat down to lunch. As he sat there at meat, far off, the first shots of the battle of Waterloo were fired.

So far, we have followed the retreat of the Prussians northwards from their defeat at Ligny. With the exception of the rearguard, they were all disposed by the evening of Sat.u.r.day the 17th in an orderly fashion round the little town of Wavre. We have also followed the methodical but tardy and ill-conceived pursuit in which Grouchy felt out with his cavalry to discover the line of the Prussian retreat, and continued to be in doubt of its nature at least until midnight, and probably until even later than midnight, in that night between Sat.u.r.day the 17th, evening, and Sunday the 18th of June.

We have further seen that during the morning of Sunday the 18th of June he was taking no dispositions for a rapid pursuit, but, being now convinced that the Prussians merely intended a general retreat upon Brussels, proposed to follow them in order to watch that retreat, and, if possible, to shepherd them eastwards. He wrote, as we have just said, to the Emperor in the course of that morning of the Sunday, announcing that he meant to ma.s.s his troops at Wavre by nightfall, and asking for orders for the next day.

What the Prussians were doing during that Sunday morning when Grouchy was so quietly and soberly taking for granted that they could not or would not rejoin Wellington, and was so quietly shielding his own responsibility behind the Emperor's orders, we shall see when we come to talk of the action itself--the battle of Waterloo.

Meanwhile we must return to the second half of the great strategic move, and watch the retreat of the Duke of Wellington during that same Sat.u.r.day, and the stand which he made on the ridge called "the Mont St Jean" by the nightfall of that day, in order to accept battle on the Sunday morning.