At this period the Prussians, advancing on the plan of invasion described above, passed the frontier, after a march of twenty days. The army of Sedan was without a leader, and incapable of resisting a force so superior in numbers and so much better organised. On the 20th of August, Longwy was invested by the Prussians; on the 21st it was bombarded, and on the 24th it capitulated. On the 30th the hostile army arrived before Verdun, invested it, and began to bombard it. Verdun taken, the road to the capital was open. The capture of Longwy, and the approach of so great a danger, threw Paris into the utmost agitation and alarm. The executive council, composed of the ministers, was summoned by the committee of general defence, to deliberate on the best measures to be adopted in this perilous conjuncture. Some proposed to wait for the enemy under the walls of the capital, others to retire to Saumur. "You are not ignorant," said Danton, when his turn to speak arrived, "that France is Paris; if you abandon the capital to the foreigner, you surrender yourselves, and you surrender France. It is in Paris that we must defend ourselves by every possible means. I cannot sanction any plan tending to remove you from it. The second project does not appear to me any better. It is impossible to think of fighting under the walls of the capital. The 10th of August has divided France into two parties, the one attached to royalty, the other desiring a republic. The latter, the decided minority of which in the state cannot be concealed, is the only one on which you can rely to fight; the other will refuse to march; it will excite Paris in favour of the foreigner, while your defenders, placed between two fires, will perish in repelling him. Should they fall, which seems to me beyond a doubt, your ruin and that of France are certain; if, contrary to all expectation, they return victorious over the coalition, this victory will still be a defeat for you; for it will have cost you thousands of brave men, while the royalists, more numerous than you, will have lost nothing of their strength and influence. It is my opinion, that to disconcert their measures and stop the enemy, we must make the royalists fear." The committee, at once understanding the meaning of these words, were thrown into a state of consternation. "Yes, I tell you," resumed Danton, "we must make them fear." As the committee rejected this proposition by a silence full of alarm, Danton concerted with the commune. His aim was to put down its enemies by terror, to involve the multitude more and more by making them his accomplices, and to leave the revolution no other refuge than victory.
Domiciliary visits were made with great and gloomy ceremony; a large number of persons whose condition, opinions, or conduct rendered them objects of suspicion, were thrown into prison. These unfortunate persons were taken especially from the two dissentient classes, the nobles and the clergy, who were charged with conspiracy under the legislative assembly. All citizens capable of bearing arms were enrolled in the Champ de Mars, and departed on the first of September for the frontier. The générale was beat, the tocsin sounded, cannon were fired, and Danton, presenting himself to the assembly to report the measures taken to save the country, exclaimed: "The cannon you hear are no alarm cannon, but the signal for attacking the enemy! To conquer them, to prostrate them, what is necessary? Daring, again daring, and still again and ever daring!" Intelligence of the taking of Verdun arrived during the night of the 1st of September. The commune availed themselves of this moment, when Paris, filled with terror, thought it saw the enemy already at its gates, to execute their fearful projects. The cannon were again fired, the tocsin sounded, the barriers were closed, and the massacre began.
During three days, the prisoners confined in the Carmes, the Abbaye, the Conciergérie, the Force, etc., were slaughtered by a band of about three hundred assassins, directed and paid by the commune. This body, with a calm fanaticism, prostituting to murder the sacred forms of justice, now judges, now executioners, seemed rather to be practising a calling than to be exercising vengeance; they massacred without question, without remorse, with the conviction of fanatics and the obedience of executioners. If some peculiar circumstances seemed to move them, and to recall them to sentiments of humanity, to justice, and to mercy, they yielded to the impression for a moment, and then began anew. In this way a few persons were saved; but they were very few. The assembly desired to prevent the massacres, but were unable to do so. The ministry were as incapable as the assembly; the terrible commune alone could order and do everything; Pétion, the mayor, had been cashiered; the soldiers placed in charge of the prisoners feared to resist the murderers, and allowed them to take their own course; the crowd seemed indifferent, or accomplices; the rest of the citizens dared not even betray their consternation. We might be astonished that so great a crime should, with such deliberation, have been conceived, executed, and endured, did we not know what the fanaticism of party will do, and what fear will suffer. But the chastisement of this enormous crime fell at last upon the heads of its authors. The majority of them perished in the storm they had themselves raised, and by the same violent means that they had themselves employed. Men of party seldom escape the fate they have made others undergo.
The executive council, directed, as to military operations by general Servan, advanced the newly-levied battalions towards the frontier. As a man of judgment, he was desirous of placing a general at the threatened point; but the choice was difficult. Among the generals who had declared in favour of the late political events, Kellermann seemed only adapted for a subordinate command, and the authorities had therefore merely placed him in the room of the vacillative and incompetent Luckner. Custine was but little skilled in his art; he was fit for any dashing coup de main, but not for the conduct of a great army intrusted with the destiny of France. The same military inferiority was chargeable upon Biron, Labourdonnaie, and the rest, who were therefore left at their old stations, with the corps under their command. Dumouriez alone remained, against whom the Girondists still retained some rancour, and in whom they, moreover, suspected the ambitious views, the tastes, and character of an adventurer, while they rendered justice to his superior talents. However, as he was the only general equal to so important a position, the executive council gave him the command of the army of the Moselle.
Dumouriez repaired in all haste from the camp at Maulde to that of Sedan. He assembled a council of war, in which the general opinion was in favour of retiring towards Châlons or Rheims, and covering themselves with the Marne. Far from adopting this dangerous plan, which would have discouraged the troops, given up Lorraine, Trois Evêchés, and a part of Champagne, and thrown open the road to Paris, Dumouriez conceived a project full of genius. He saw that it was necessary, by a daring march, to advance on the forest of Argonne, where he might infallibly stop the enemy. This forest had four issues; that of the Chêne-Populeux on the left; those of the Croix-au-Bois and of Grandpré in the centre, and that of Les Islettes on the right, which opened or closed the passage into France. The Prussians were only six leagues from the forest, and Dumouriez had twelve to pass over, and his design of occupying it to conceal, if he hoped for success. He executed his project skilfully and boldly. General Dillon, advancing on the Islettes, took possession of them with seven thousand men; he himself reached Grandpré, and there established a camp of thirteen thousand men. The Croix-au-Bois, and the Chêne-Populeux were in like manner occupied and defended by some troops. It was here that he wrote to the minister of war, Servan:—"Verdun is taken; I await the Prussians. The camps of Grandpré and Les Islettes are the Thermopylae of France; but I shall be more fortunate than Leonidas."
In this position, Dumouriez might have stopped the enemy, and himself have securely awaited the succours which were on their road to him from every part of France. The various battalions of volunteers repaired to the camps in the interior, whence they were despatched to his army, as soon as they were at all in a state of discipline. Beurnonville, who was on the Flemish frontier, had received orders to advance with nine thousand men, and to be at Rhétel, on Dumouriez's left, by the 13th of September. Duval was also on the 7th to march with seven thousand men to the Chêne-Populeux; and Kellermann was advancing from Metz, on his right, with a reinforcement of twenty-two thousand men. Time, therefore, was all that was necessary.
The duke of Brunswick, after taking Verdun, passed the Meuse in three columns. General Clairfait was operating on his right, and prince Hohenlohe on his left. Renouncing all hope of driving Dumouriez from his position by attacking him in front, he tried to turn him. Dumouriez had been so imprudent as to place nearly his whole force at Grandpré and the Islettes, and to put only a small corps at Chêne-Populeux and Coix-au- Bois—posts, it is true, of minor importance. The Prussians, accordingly, seized upon these, and were on the point of turning him in his camp at Grandpré, and of thus compelling him to lay down his arms. After this grand blunder, which neutralized his first manoeuvres, he did not despair of his situation. He broke up his camp secretly during the night of the 14th September, passed the Aisne, the approach to which might have been closed to him, made a retreat as able as his advance on the Argonne had been, and concentrated his forces in the camp at Sainte-Menehould. He had already delayed the advance of the Prussians at Argonne. The season, as it advanced, became bad. He had now only to maintain his post till the arrival of Kellermann and Beurnonville, and the success of the campaign would be certain. The troops had become disciplined and inured, and the army amounted to about seventy thousand men, after the arrival of Beurnonville and Kellermann, which took place on the 17th.
The Prussian army had followed the movements of Dumouriez. On the 20th, it attacked Kellermann at Valmy, in order to cut off from the French army the retreat on Châlons. There was a brisk cannonade on both sides. The Prussians advanced in columns towards the heights of Valmy, to carry them. Kellermann also formed his infantry in columns, enjoined them not to fire, but to await the approach of the enemy, and charge them with the bayonet. He gave this command, with the cry of Vive la nation! and this cry, repeated from one end of the line to the other, startled the Prussians still more than the firm attitude of our troops. The duke of Brunswick made his somewhat shaken battalions fall back; the firing continued till the evening; the enemy attempted a fresh attack, but were repulsed. The day was ours; and the success of Valmy, almost insignificant in itself, produced on our troops, and upon opinion in France, the effect of the most complete victory.
From the same epoch may be dated the discouragement and retreat of the enemy. The Prussians had entered upon this campaign on the assurance of the emigrants that it would be a mere military promenade. They were without magazines or provisions; in the midst of a perfectly open country, they encountered a resistance each day more energetic; the incessant rains had broken up the roads; the soldiers marched knee-deep in mud, and, for four days past, boiled corn had been their only food. Diseases, produced by the chalky water, want of clothing, and damp, had made great ravages in the army. The duke of Brunswick advised a retreat, contrary to the opinion of the king of Prussia and the emigrants, who wished to risk a battle, and get possession of Châlons. But as the fate of the Prussian monarchy depended on its army, and the entire ruin of that army would be the inevitable consequence of a defeat, the duke of Brunswick's opinion prevailed. Negotiations were opened, and the Prussians, abating their first demands, now only required the restoration of the king upon the constitutional throne. But the convention had just assembled; the republic had been proclaimed, and the executive council replied, "that the French republic could listen to no proposition until the Prussian troops had entirely evacuated the French territory." The Prussians, upon this, commenced their retreat on the evening of the 30th of September. It was slightly disturbed by Kellermann, whom Dumouriez sent in pursuit, while he himself proceeded to Paris to enjoy his triumph, and concert measures for the invasion of Belgium. The French troops re-entered Verdun and Longwy; and the enemy, after having crossed the Ardennes and Luxembourg, repassed the Rhine at Coblentz, towards the end of October. This campaign had been marked by general success. In Flanders, the duke of Saxe-Teschen had been compelled to raise the siege of Lille, after seven days of a bombardment, contrary, both in its duration and in its useless barbarity, to all the usages of war. On the Rhine, Custine had taken Trèves, Spires, and Mayence. In the Alps, general Montesquiou had invaded Savoy, and general Anselme the territory of Nice. Our armies, victorious in all directions, had everywhere assumed the offensive, and the revolution was saved.
If we were to present the picture of a state emerging from a great crisis, and were to say: "There were in this state an absolute government whose authority has been restricted; two privileged classes which have lost their supremacy; a vast population, already freed by the effect of civilization and intelligence, but without political rights, and who have been obliged, by reason of repeated refusals, to gain these for themselves"; if we were to add: "The government, after opposing this revolution, submitted to it, but the privileged classes constantly opposed it,"—the following would probably be concluded from these data: