Before the end of autumn of the year 1591, Henry had laid siege to Rouen, then the second city of the kingdom. To leave much longer so important a place—dominating, as it did, not only Normandy but a principal portion of the maritime borders of France—under the control of the League and of Spain was likely to be fatal to Henry's success. It was perfectly sound in Queen Elizabeth to insist as she did, with more than her usual imperiousness towards her excellent brother, that he should lose no more time before reducing that city. It was obvious that Rouen in the hands of her arch-enemy was a perpetual menace to the safety of her own kingdom. It was therefore with correct judgment, as well as with that high-flown gallantry so dear to the heart of Elizabeth, that her royal champion and devoted slave assured her of his determination no longer to defer obeying her commands in this respect.

The queen had repeatedly warned him of the necessity of defending the maritime frontier of his kingdom, and she was not sparing of her reproaches that the large sums which she expended in his cause had been often ill bestowed. Her criticisms on what she considered his military mistakes were not few, her threats to withdraw her subsidies frequent. "Owning neither the East nor the West Indies," she said, "we are unable to supply the constant demands upon us; and although we have the reputation of being a good housewife, it does not follow that we can be a housewife for all the world." She was persistently warning the king of an attack upon Dieppe, and rebuking him for occupying himself with petty enterprises to the neglect of vital points. She expressed her surprise that after the departure of Parma, he had not driven the Spaniards out of Brittany, without allowing them to fortify themselves in that country. "I am astonished," she said to him, "that your eyes are so blinded as not to see this danger. Remember, my dear brother," she frankly added, "that it is not only France that I am aiding, nor are my own natural realms of little consequence to me. Believe me, if I see that you have no more regard to the ports and maritime places nearest to us, it will be necessary that my prayers should serve you in place of any other assistance, because it does not please me to send my people to the shambles where they may perish before having rendered you any assistance. I am sure the Spaniards will soon besiege Dieppe. Beware of it, and excuse my bluntness, for if in the beginning you had taken the maritime forts, which are the very gates of your kingdom, Paris would not have been so well furnished, and other places nearer the heart of the kingdom would not have received so much foreign assistance, without which the others would have soon been vanquished. Pardon my simplicity as belonging to my own sex wishing to give a lesson to one who knows better, but my experience in government makes me a little obstinate in believing that I am not ignorant of that which belongs to a king, and I persuade myself that in following my advice you will not fail to conquer your assailants."

Before the end of the year Henry had obtained control of the, Seine, both above and below the city, holding Pont de l'Arche on the north—where was the last bridge across the river; that of Rouen, built by the English when they governed Normandy, being now in ruins—and Caudebec on the south in an iron grasp. Several war-vessels sent by the Hollanders, according to the agreement with Buzanval, cruised in the north of the river below Caudebec, and rendered much service to the king in cutting off supplies from the beleaguered place, while the investing army of Henry, numbering twenty-five thousand foot—inclusive of the English contingent, and three thousand Netherlanders—and ten thousand cavalry, nearly all French, was fast reducing the place to extremities.

Parma, as usual, in obedience to his master's orders, but entirely against his own judgment, had again left the rising young general of the Netherlands to proceed from one triumph to another, while he transferred beyond the borders of that land which it was his first business to protect, the whole weight of his military genius and the better portion of his well disciplined forces.

Most bitterly and indignantly did he express himself, both at the outset and during the whole progress of the expedition, concerning the utter disproportions between the king's means and aims. The want of money was the cause of wholesale disease, desertion, mutiny, and death in his slender army.

Such great schemes as his master's required, as he perpetually urged, liberality of expenditure and measures of breadth. He protested that he was not to blame for the ruin likely to come upon the whole enterprise. He had besought, remonstrated, reasoned with the king in vain. He had seen his beard first grow, he said, in the king's service, and he had grown gray in that service, but rather than be kept longer in such a position, without money, men, or means to accomplish the great purposes on which he was sent, he protested that he would "abandon his office and retire into the woods to feed on roots." Repeatedly did he implore his master for a large and powerful army; for money and again money. The royal plans should be enforced adequately or abandoned entirely. To spend money in small sums, as heretofore, was only throwing it into the sea.

It was deep in the winter however before he could fairly come to the rescue of the besieged city. Towards the end of January, 1592, he moved out of Hainault, and once more made his junction at Guise with the Duke of Mayenne. At a review of his forces on 16th January, 1592, Alexander found himself at the head of thirteen thousand five hundred and sixteen infantry and four thousand and sixty-one cavalry. The Duke of Mayenne's army, for payment of which that personage received from Philip 100,000 dollars a month, besides 10,000 dollars a month for his own pocket, ought to have numbered ten thousand foot and three thousand horse, according to contract, but was in reality much less.

The Duke of Montemarciano, nephew of Gregory XIV., had brought two thousand Swiss, furnished by the pontiff to the cause of the League, and the Duke of Lorraine had sent his kinsmen, the Counts Chaligny and Vaudemont, with a force of seven hundred lancers and cuirassiers.

The town of Fere was assigned in pledge to Farnese to hold as a convenient: mustering-place and station in proximity to his own borders, and, as usual, the chief command over the united armies was placed in his hands. These arrangements concluded, the allies moved slowly forward much in the same order as in the previous year. The young Duke of Guise, who had just made his escape from the prison of Tours, where he had been held in durance since the famous assassination of his father and uncle, and had now come to join his uncle Mayenne, led the vanguard. Ranuccio, son of the duke, rode also in the advance, while two experienced commanders, Vitry and De la Chatre, as well as the famous Marquis del Vasto, formerly general of cavalry in the Netherlands, who had been transferred to Italy but was now serving in the League's army as a volunteer, were associated with the young princes. Parma, Mayenne, and Montemarciano rode in the battalia, the rear being under command of the Duke of Aumale and the Count Chaligny. Wings of cavalry protected the long trains of wagons which were arranged on each flank of the invading army. The march was very slow, a Farnese's uniform practice to guard himself scrupulously against any possibility of surprise and to entrench himself thoroughly at nightfall.

By the middle of February they reached the vicinity of Aumale in Picardy. Meantime Henry, on the news of the advance of the relieving army, had again the same problem to solve that had been presented to him before Paris in the summer of 1590. Should he continue in the trenches, pressing more and more closely the city already reduced to great straits? Should he take the open field against the invaders and once more attempt to crush the League and its most redoubtable commander in a general engagement? Biron strenuously advised the continuance of the siege. Turenne, now, through his recent marriage with the heiress, called Duc de Bouillon, great head of the Huguenot party in France, counselled as warmly the open attack. Henry, hesitating more than was customary with him, at last decided on a middle course. The resolution did not seem a very wise one, but the king, who had been so signally out-generalled in the preceding campaign by the great Italian, was anxious to avoid his former errors, and might perhaps fall into as great ones by attempting two inconsistent lines of action. Leaving Biron in command of the infantry and a portion of the horse to continue the siege, he took the field himself with the greater part of the cavalry, intending to intercept and harass the enemy and to prevent his manifest purpose of throwing reinforcements and supplies into the invested city.