The accompanying sketch map will explain the position. Valenciennes and Condé have fallen; Lequesnoy, the small fortress subsidiary to Valenciennes, has not yet been attacked but comes next in the series, when the moment was judged propitious for the detachment of the Anglo-Hanoverian force with a certain number of Imperial Allies to march to the sea.

It must always be remembered by the reader of history that military situations, like the situations upon a chess board, rather happen than are designed; and the situation which developed at the end of September upon the extreme north and west of the line which the French were attempting to hold against the Allies was strategically of this nature. When the Duke of York insisted upon a division of the forces of the Allies and an attack upon Dunquerque, no living contemporary foresaw disaster.

Showing condition of the frontier fortresses blocking the road to Paris when the expedition to Dunquerque was decided upon. August 1793.

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Coburg, indeed, would have preferred the English to remain with him, and asked them to do so, but he felt in no sort of danger through their temporary absence, nor, as a matter of fact, was he in any danger through it.

Again, though the positions which the Duke of York took up when he arrived in front of Dunquerque were bad, neither his critics at home, nor any of his own subordinates, nor any of the enemy, perceived fully how bad they were. It was, as will presently be seen, a sort of drift, bad luck combined with bad management, which led to this British disaster, and (what was all-important for the conduct of the war) to the first success in a general action which the French had to flatter and encourage themselves with during all that fatal summer.

The Duke of York separated his force from that of Coburg just before the middle of August; besides the British, who were not quite 7,000 strong, 11,000 Austrians, over 10,000 Hanoverians and 7,000 Hessians were under his command. The total force, therefore, was nearly 37,000 strong. No one could imagine that, opposed by such troops as the French were able to put into line, and marching against such wretched defences as those of Dunquerque then were, the Duke’s army had not a perfectly easy task before it; and the plan, which was to take Dunquerque and upon the return to join the Austrian march on Paris, was reasonable and feasible.

It is important that the reader should firmly seize this and not read history backward from future events.

Certain faults are to be observed in the first conduct of the march. It began on the 15th of August, proceeding from Marchiennes to Menin, and at the outset displayed that deplorable lack of marching power which the Duke of York’s command had shown throughout the campaign.[6] From Marchiennes to Tourcoing is a long day’s march: it took the Duke of York four days; and, take the march altogether, nine days were spent in covering less than forty miles. In the course of that march, the British troops had an opportunity of learning to despise their adversary: they found at Linselles, upon the flank of their advance, a number of undisciplined boys who broke the moment the Guards were upon them, and whose physical condition excited the ridicule of their assailants. The army proceeded after this purposeless and unfruitful skirmish to the neighbourhood of the sea coast, and the siege of Dunquerque was undertaken under conditions which will be clear to the reader from the following sketch map.