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In order to understand what happened at the Battle of Tourcoing, it is first necessary to have in mind the general situation of the forces which opposed each other round and about what is now the Franco-Belgian frontier, in the spring of 1794.

These forces were, of course, those of the French Republic upon the one hand, upon the other the coalition with its varied troops furnished by Austria, by Prussia, by England, and some few by sundry of the small States which formed part of the general alliance for the destruction of the new democracy.

The whole campaign of 1794 stands apart from that of 1793. The intervening winter was a period during which, if we disregard a number of small actions in which the French took the offensive, nothing of moment was done upon either side, and we must begin our study with the preparations, originating in the month of February, for the active efforts which it was proposed to attempt when the spring should break.

In that month of February, Mack, recently promoted to the rank of Major-General in the Austrian army, met the Duke of York, the young soldier son of George III., in London, to concert the common plan. It was upon the 12th of that month that this meeting took place. Mack brought the news to the British Cabinet that the Emperor of Austria, his master, was prepared to act as Commander-in-Chief of the allied army in the coming campaign, proposed a general plan of advancing from the Belgian frontier upon Paris after the capture of the frontier fortresses, and negotiated for the largest possible British contingent.

Coburg, it was arranged, should be the General in practical command (under the nominal headship of the Emperor). Prussian troops, in excess of the twenty thousand which Prussia owed as a member of the Empire, were obtained upon the promise of a large subsidy from England and Holland, and with the month of April some 120,000 men were holding the line from Treves to the sea. This passed through and occupied Dinant, Bavai, Valenciennes, St. Amand, Denain, Tournai, Ypres, and Nieuport. To this number must be added men in the garrisons, perhaps some 40,000 more. Of this long line the strength lay in the centre.

The central army, under the general command of Coburg, who had his headquarters at Valenciennes, was, if we exclude men in garrisons, somewhat over 65,000 in strength, or more than half the whole strength of the long line. With Coburg in the central army was the Duke of York with some 22,000, and the Prince of Orange with a rather smaller contingent of Dutch.

Over against this long line with its heavy central “knot” or bulk of men under Coburg, in the neighbourhood of Valenciennes, the genius of Carnot had mustered over 200,000 French troops, which, when we have deducted various items for garrisons and other services, counted as effective more than 150,000 but less than 160,000 men. This French line extended from the sea to Maubeuge, passing through Dunquerque, Cassel, Lille, Cambrai, and Bouchain.

It was as a fact a little before the opening of April that the French began the campaign by taking the offensive on a large scale upon the 29th of March.

Sketch Map showing the opposing French and Allied lines. April 1794

Pichegru, who was in command of that frontier army, attacked, with 30,000 men, the positions of the allies near Le Cateau, well to the right or south-east of their centre and his, and was beaten back.

It was upon the 14th of April that the Emperor of Austria joined Coburg at Valenciennes, held a review of his troops (including the British contingent, which will be given later in detail), fixed his headquarters in the French town of Le Cateau, and at once proceeded to the first operation of the campaign, which was the siege of the stronghold of Landrecies. The Dutch contingent of the allies drove in the French outposts and carried the main French position in front of the town within that week. By the 22nd of April the garrison of Landrecies was contained, the beleaguering troops had encircled it, and the siege was begun.

After certain actions (most of them partial, and one of peculiar brilliance in the history of the British cavalry), actions each of interest, and some upon a considerable scale, but serving only to confuse the reader if they were here detailed, Landrecies fell after eight days’ siege, upon the 30th of April. An advance of the Austrian centre, after this success, was naturally expected by the French.

That normal development of the campaign did not take place on account of a curious episode in the strategy of this moment to which I beg the reader to give a peculiar attention. It is necessary to grasp exactly the nature of that episode, for it determined all that was to follow.

While the fate of Landrecies still hung in the balance, and before the surrender of the town, Pichegru had, in another part of the long line, scored one of those successes which in any game or struggle are worse than losing a trick or suffering a defeat. It was one of those successes in which one gets the better of one’s opponent in one chance part of the general contest, but so triumphs without a set plan, with no calculation upon what should follow upon the achievement, and therefore with every prospect of finding oneself in a worse posture after it than before.

To take an analogy from chess: Pichegru’s error, which I will presently describe, might be compared to the action of a player who, taking a castle of his opponent’s with his queen, thereby leaves his king unguarded and open to check-mate.

Wherever men are opposed one to the other in lines, each line having the mission to advance against the other, it is a fatal move to get what footballers call “ ’fore side”: to let a portion of your forces advance too far from the general line held by the whole, and to have the advanced part of that portion thus isolated from the support of its fellows. Such a formation invites a concentration of your opponents against the isolated body, and may lead to its destruction.

It was precisely in this position that Pichegru placed a portion of his forces by the ill-advised advance he made down the valley of the Lys to Courtrai.

Taking advantage of the way in which the main forces of the allies were tied to the siege of Landrecies, the French commander wisely moved forward the whole of his forces to the north and west, pushing the enemy back before him to the line Ypres-Menin, and besieging Menin itself. But most unwisely he not only permitted to advance, but himself directed and led, a body of 30,000 men (the command of General Souham) far forward of this general movement: he actually carried it on as far as the town of Courtrai.

The accompanying sketch map shows how much too far advanced this wedge of men (so large a contingent to imperil by isolation!) was beyond the general line, and, to repeat the phrase I have just used, a metaphor which best expresses my meaning, Souham and his division, by Pichegru’s direct orders, had got “ ’fore side.”

The only excuse that can be pleaded for Pichegru’s folly in this matter, was the temptation presented by the weak garrison of Courtrai, and the bait which a facile temporary success always holds out for a man who has formed no consistent general plan. But that very excuse is the strongest condemnation of the inexcusable error, and this strategical fault of Pichegru’s was soon paid for by the imperilling of all the great body of French troops within that rashly projected triangle.

For the moment Pichegru may have foolishly congratulated himself that he had done something of military value, as he had certainly done something striking. Menin fell to the French on the same day that Landrecies did to the Austrians, and this further success doubtless tempted him to remain with the head of his wedge at Courtrai, when every consideration of strategy should have prompted him to retrace his steps and to recall the over-advanced division back into line.

This isolated position down the valley of the Lys, this wedge thrust out in front of Lille, positively asked the allies to attack it.

The enemy was a fortnight developing his plan, but his delay was equalled by Pichegru’s determination to hold the advanced post he had captured; and when the allies did finally close in upon that advanced post, nothing but a series of accidents, which we shall follow in detail when we come to the story of the action, saved Souham from annihilation. And the destruction of Souham’s division, considering its numbers and its central position, might have involved the whole French line in a general defeat.

As I have said, it was at the end of April that this false success of Pichegru’s was achieved, and a whole fortnight was to elapse before the allies concentrated to take advantage of that error, and to cut off Souham’s division.

That fortnight was full of minor actions, not a few of them interesting to the student of military history, and one again remarkable as a feat of English horse. I deliberately omit all mention of these lest I should confuse the reader and disturb his conception of the great battle that was to follow.

That battle proceeded upon a certain plan thought out in detail, perfectly simple in character, and united in conception. It failed, as we shall see; and by its failure turned what should have been the cutting-off and destruction of Souham’s command into a signal French victory. But before we can understand the causes of its failure, we must grasp the plan itself in its major lines, and with that object I shall discuss it in my next section under the title of “The Plan of the Allies.”