From this natural wall a rock projects against the river and over the dwellings, forming quite a natural fortress. It was supplied with water by three fountains. On this rock, then, the Vaudois determined to await the enemy, instead of fleeing from mountain to mountain as they had previously done. To this end they excavated, threw up entrenchments, made covered ways, and executed a series of defences in harmony with what might have been the suggestions of a skilful military engineer. They had three lines of defence within the fortifications on the lower rock, and then, on an eminence yet higher, they constructed a little fort, with triple entrenchment, and lastly, overlooking all, they posted a watch to give notice of the least movement of the enemy. In addition to this they repaired the mill at the foot of their fortifications. During this Arnaud preached twice a week and conducted daily prayer. The Vaudois had only been a few days at their work, when the French battalions, unable to meet with them at Rodoret, followed them down the valley, having already surprised their outposts at Passet, though without inflicting loss. On the 29th of October the enemy surrounded them with troops from Friday to Sunday. They also tried to force the bridge, but were compelled to retreat, leaving sixty men killed and as many wounded, while the Vaudois had not lost a man. In the month of November the French captured one of Arnaud's men, who had gone to nurse a sick friend, and in spite of the entreaties of the judge at Pérousé, a Roman Catholic, the commandant, De l'Ombraille, insisted on his execution. They made no further assault upon the castle, but having burnt all the houses, farm buildings, corn stacks, &c., they retired, telling the Vaudois "to have patience, and they would return after Easter." They were now comparatively free in their movements, and felt intensely thankful to that gracious Father who had preserved them through so many dangers, and given them, to retain possession of, the land they had come to reclaim. They were about 400 strong, exclusive of that division which had fixed itself on the mountains of Angrogna, and the two little bands which still found a refuge in the wilds of the glen Guichard, or among the rocks overhanging Bobbio.
The question of food made them anxious. But that God who had so wonderfully provided for them in the past, had made as remarkable provision for this necessity. A fall of snow had covered the corn which had ripened in September, but was left standing in the fields by this circumstance. Thus hidden from the enemy, a sudden thaw revealed the treasure thus mercifully laid up for these patriot warriors. In addition to the corn, strong detachments made requisitions on the valleys of Pragela and Queyras, and so obtained supplies of butter, salt, wine, and other provisions. A sad incident of the winter arose from the condition of one of those little parties, whom the chances of war or some imprudence separated from the main body. A band of twelve, concealed in a cave behind L'Essart, near Bobbio, were obliged by hunger to come out for provisions. On returning, they thought they had been tracked in the snow, and so decided to betake themselves to a new place of refuge in La Biava. Scarcely had they set out, however, than they discovered 125 peasants in pursuit of them. They threw down their baggage, and having reached a commanding height, poured down such an effective volley that their assailants sought a truce, and acknowledged twelve dead and thirteen wounded, though not one of the Vaudois was the least hurt. Their victory did not, however, relieve them for long. Although their refuge was secure, the extreme cold made it untenable, and they were compelled to seek a milder climate. Saddened by suffering, and resolved to protect themselves, they met on their way an armed band. Assuming that they were enemies, they fired and killed one of the party, when, to their great grief, blended with unutterable joy, they discovered that they were brethren. With tears in their eyes they embraced each other, and found the safety and succour they had almost despaired of in the castle at Balsille.
During the winter months messages were sent to induce the Vaudois to withdraw from their native land. To this Arnaud sent suitable replies, and also strengthened the fortifications in the only part which had been left open by the river side.
On the 1st of May, 12,000 Piedmontese troops and 10,000 French, making a total of 22,000 troops, under the command of Catinat, surrounded Arnaud's retreat. A body of horse soldiers concealed themselves in the neighbouring woods, but were received with so effective a discharge of shot as to inflict great loss. The main body of the assailants drew up to the foot of the rock, but had to make a rapid retreat, with severe loss both in dead and wounded. After this an engineer, having surveyed the approaches to the castle through a glass, ordered a picked corps of 500 men to advance in that direction, supported by some 700 peasants of Pragela and Queyras, for the purpose of destroying the fence of trees and palisades constructed by Arnaud. Their attack was covered by the fire of 700 men, drawn up in line of battle. But all was in vain; the fortifications were impregnable, and the Vaudois, taking advantage of their confusion, poured down upon them with such vigour that only ten or twelve men escaped. The commander and two sergeants who remained by his side were taken prisoners, but not a single Vaudois was injured. The enemy retreated in great confusion, and Arnaud, assembling his men for thanksgiving and prayer, spoke so powerfully that both pastor and people, officers and men, were affected to tears. On searching the bodies of the slain, a number of popish charms were found, vainly used as preservatives against the attacks of men who were supposed to be in league with the evil one.
Catinat, like the Marquis de Larcy, in the affair of the bridge at Salabertrand, was so mortified at his want of success, that he declined to head another assault against the Vaudois, therefore he entrusts the command to the Marquis de Fequières. This new attack, on the 10th of May, deprived Arnaud and his men of the privilege of the Holy Communion, which they had desired to partake of on Whit Monday. The day following that on which the enemy's vanguard was observed, de Fequières formed his men into five divisions, and completely invested the Vaudois stronghold. Finding the discharge of musketry useless, he planted a cannon, loaded with balls weighing eight pounds, on the Mont Guignivert, exactly opposite to La Balsille. He then hoisted a white flag, and afterwards a red, signifying that unless the besieged asked for peace that no quarter would be granted. They had previously refused to surrender, on the ground "that they looked to the aid of God to protect them in the heritage of their fathers, but that if it were otherwise, they would not yield while life lasted."
The day following a breach was made, and an assault directed to three different points. The attacking columns were covered by a furious cannonade, and yet, wonderful to relate, none of the defenders were struck. However, the lower entrenchments had to be abandoned, and M. de Parat, the French prisoner, put to death, he acknowledging the necessity of the sentence. Indeed, a crisis had come. Balsille could not be defended much longer. The watch on the summit had been driven away by the enemy commanding the opposite rocks. Happily the darkness was coming on, and by its aid one means of safety was looked for, viz., flight. But when the Vaudois looked out upon the glare of the enemy's camp fires their hearts almost sank within them. And the French, on their part, were joyfully anticipating their speedy destruction. But He who had so often fought for Israel only permitted them to be reduced to such straits that they might learn afresh how completely He was on their side. The camp fires, having by their light revealed a possibility of escape through a frightful ravine, were extinguished, so far as service to the enemy was concerned, by means of a thick fog! So under cover of this shield of the Almighty the devoted band, led by Captain Poulat, a native of Balsille, let themselves down by an opening in the rocks. The journey was one of great difficulty. Branches of trees and projecting ledges of rocks were used to assist the descent, which was chiefly made in a sitting or sliding posture. Nor could the fugitives altogether escape the neighbourhood of the French patrols, so closely were they posted to the castle. One of the Vaudois, using his hands to save himself from falling, let drop a kettle he was carrying, which by its rolling down excited the notice of the sentinel, who at once gave the challenge, "Who goes there?" But as the kettle made no reply, the men passed on, Arnaud humorously relates. After descending the precipitous sides of Mont Guignivert, the Vaudois directed their steps southward towards Salse. It was now two hours after the break of day, and they were cutting steps for themselves in the snow. A portion of the enemy's watch discovered that they had escaped, and gave the alarm. Very quickly the enemy pursued them in their journey, first of all for rest at Salse, then on to Rodoret. Finding this, the Vaudois betook themselves to the summit of Galmon, where they halted, and Arnaud reviewed his men. The sick and wounded were sent to a declivity to be tended by the surgeon of M. Parat, under a strong guard. The main body passed the night in the wood of Serrelémi. A fog fortunately rising, enabled them to advance to a hamlet called La Majère, where a shower of rain gave them a much-needed supply of water. On the 17th of May, 1690 they had a sharp skirmish in the village and churchyard of Pramol. They killed fifty-seven, and captured the commandant, from whom Arnaud learnt that in three days Victor Amadeus would have to decide as to the question of continuing his alliance with France, or of uniting with England and other European states against Louis XIV. Arnaud, who by his former intimacy with the Prince of Orange, now William III. of England, was well acquainted with European politics, at once saw how important was this news, and awaited the result with corresponding anxiety.
The day after (Sunday), whilst Arnaud and his men were on the heights of Angrogna, two messengers, sent by General Palavicini, announced the decision of Victor Amadeus, and offered terms of peace in his name. The sudden pleasure of such a communication, after nine months of hardship, toil, and fighting, might have been too much for these poor persecuted ones, had it not been tempered with doubts as to its truthfulness. But gradually events confirmed their hopes, and scattered their fears. Provisions were sent to Arnaud's men. The ministers, Montoux and Bastie, with others who had been confined at Turin, now hastened to meet their brethren. Everywhere they seemed treated with confidence; and, in conjunction with the Duke's troops, they made several successful attacks upon the French.
One of Arnaud's men having captured a courier carrying despatches for the King of France, Palavicini, commander-in-chief of the troops of Piedmont, was ordered to bring Arnaud with him into the presence of Amadeus. The latter received the Vaudois deputation most graciously, and expressed his desire that they should be henceforth friends, assuring them "that if they hazarded their lives in his service, he also would hazard his for them." In proof of this cordial reconciliation, Amadeus conferred the rank of colonel on the brave Arnaud, the chieftain of the Vaudois. He also granted permission for the families of the banished ones to return to their valleys, and decreed the restoration of their ancient possessions. Early in July Arnaud hastened to Milan to meet the refugees from Switzerland and Germany, who with wives and children set out for their native valleys, aided even by the kind help of those who, like the Elector of Brandenburg, had given them shelter at some expense in his dominions, but who now made fresh sacrifices to gratify the longing of their hearts.
Victor Amadeus was faithful to his promise, and not only allowed the exiles to return to home and faith, but he also consented that some who under the severity of trial had abjured their faith should be allowed the privilege of returning to their first and purer creed. In return for this kindness, as well as in strict conformity with their own patriotic and pious principles, the Vaudois greatly assisted the Duke of Savoy in his war with France, is the testimony of Botta in his Storia d'Italia. The Count of Saluzzo also testifies "that they hastened to join the Marquis de Perelle, who had not long before attacked them, and that their skirmishes cost the enemy, whom they drove from Lucerna, more than a thousand men." Beauregard, in his "Historical Memories of the House of Savoy," says, that "the barbets, by their bravery, made themselves formidable to the French;" and with regard to the siege of Coni, mentions with special praise the services of a troop of "eight hundred Vaudois, under the command of a chief celebrated among them." This chief, no doubt, was Arnaud; but whilst he was anxious that they should render to their prince every possible help in a military point of view, the latter sought to carry out his intention of restoring the Vaudois to their property; but there were great difficulties in the way.
By the edict of May 23rd, 1694, the ancient rights of the Vaudois are acknowledged, and the persecuting decrees of January and April, 1686, revoked. The pope, Innocent XII., tried to invalidate the decree, but the Senate of Turin confirmed the edict of their sovereign, and prohibited the bull of the pope.