His troops were starving, and the way to Calais lay across the French army. But the King's courage rose with the peril. A knight in his train wished that the thousands of stout warriors lying idle that night in England had been standing in his ranks. Henry answered with a burst of scorn. "I would not have a single man more," he replied. "If God give us the victory, it will be plain we owe it to His grace. If not, the fewer we are, the less loss for England." Starving and sick as they were, the handful of men whom he led shared the spirit of their king. As the chill rainy night passed away he drew up his army on the twenty-fifth of October and boldly gave battle. The English archers bared their arms and breasts to give fair play to "the crooked stick and the gray goose wing," but for which as the rhyme ran " England were but a fling," and with a groat shout sprang forward to the attack. The sight of their advance roused the fiery pride of the French; the wise resolve of their leaders was forgotten, and the dense mass of men-at-arms plunged heavily forward through miry ground on the English front. But at the first sign of movement Henry had halted his line, and fixing in the ground the sharpened stakes with which each man was furnished his archers poured their fatal arrow flights into the hostile ranks. The carnage was terrible, for though the desperate charges of the French knighthood at last drove the English archers to the neighboring woods, from the skirt of these woods they were still able to pour their shot into the enemy's flanks, while Henry with the men-at-arms around him flung himself on the French line. In the terrible struggle which followed the King bore off the palm of bravery: he was felled once by a blow from a French mace and the crown of his helmet was cleft by the sword of the Duke of Alencon; but the enemy was at last broken, and the defeat of the main body of the French was followed by the rout of their reserve. The triumph was more complete, as the odds were even greater, than at Crecy. Eleven thousand Frenchmen lay dead on the field, and more than a hundred princes and great lords were among the fallen.

The immediate result of the battle of Agincourt was small, for the English army was too exhausted for pursuit, and it made its way to Calais only to return to England Through 1416 the war was limited to a contest for the command of the Channel, till the increasing bitterness of the strife between the Burgundians and Armagnacs and the consent of John of Burgundy to conclude an alliance encouraged Henry to resume his attempt to recover Normandy. Whatever may have been his aim in this enterprise whether it were, as has been suggested, to provide a refuge for his house, should its power be broken in England, or simply to acquire a command of the seas the patience and skill with which his object was accomplished raise him high in the rank of military leaders. Disembarking in July, 1417, with an army of forty thousand men near the mouth of the Touque, he stormed Caen, received the surrender of Bayeux, reduced Alencon and Falaise, and detaching his brother the Duke of Gloucester in the spring of 1418 to occupy the Cotentin made himself master of Avranches and Domfront. With Lower Normandy wholly in his hands, be advanced upon Evreux, captured Louviers, and seizing Pont de I'Arche, threw his troops across the Seine. The end of these masterly movements was now revealed. Rouen was at this time the largest and wealthiest of the towns of France; its walls were defended by a powerful artillery; Alan Blanchard, a brave and resolute patriot, infused the fire of his own temper into the vast population ; and the garrison, already strong, was backed by fifteen thousand citizens in arms. But the genius of Henry was more than equal to the difficulties with which he had to deal. He had secured himself from an attack on his rear by the reduction of Lower Normandy, his earlier occupation of Harfleur severed the town from the sea, and his conquest of Pont de I'Arche cut it off from relief on the side of Paris. Slowly but steadily the King drew his lines of investment round the doomed city; a flotilla was brought up from Harfleur, a bridge of boats thrown over the Seine above the town, the deep trenches of the besiegers protected by posts, and the desperate sallies of the garrison stubbornly beaten back. For six months Rouen held resolutely out, but famine told fast on the vast throng of country folk who had taken refuge within its walls. Twelve thousand of these were at last thrust out of the city gates, but the cold policy of the conqueror refused them passage, and they perished between the trenches and the walls. In the hour of their agony women gave birth to infants, but even the new-born babes which were drawn up in baskets to receive baptism were lowered again to die on their mothers' breasts. It was little better within the town itself. As winter drew on one-half of the population wasted away. "War," said the terrible King, "has three handmaidens ever waiting on her, Fire, Blood, and Famine, and I have chosen the meekest maid of the three." But his demand of unconditional surrender nerved the citizens to a resolve of despair; they determined to fire the city and fling themselves in a mass on the English lines; and Henry, fearful lest his prize should escape him at the last, was driven to offer terms. Those who rejected a foreign yoke were suffered to leave the city, but his vengeance reserved its victim in Alan Blanchard, and the brave patriot was at Henry's orders put to death in cold blood.

A few sieges completed the reduction of Normandy. The King's designs were still limited to the acquisition of that province; and pausing in his career of conquest, he strove to win its loyalty by a remission of taxation and a redress of grievances, and to seal its possession by a formal peace with the French Crown. The conferences, however, which were held for this purpose at Pontoise in 1419 failed through the temporary reconciliation of the French factions, while the length and expense of the war began to rouse remonstrance and discontent at home. The King's difficulties were at their height when the assassination of John of Burgundy at Montereau in the very presence of the Dauphin with whom he had come to hold conference rekindled the fires of civil strife. The whole Burgundian party with the new Duke of Burgundy, Philip the Good, at its head flung itself in a wild thirst for revenge into Henry's hands. The mad King, Charles the Sixth, with his Queen and daughters were in Philip's power; and in his resolve to exclude the Dauphin from the throne the Duke stooped to buy English aid by giving Catharine, the eldest of the French princesses, in marriage to Henry, by conferring on him the Regency during the life of Charles, and recognizing his succession to the crown at that sovereign's death. A treaty which embodied these terms was solemnly ratified by Charles himself in a conference at Troyes in May, 1420; and Henry, who in his new capacity of Regent undertook to conquer in the name of his father-in-law the territory held by the Dauphin, reduced the towns of the Upper Seine and at Christmas entered Paris in triumph side by side with the King. The States-General of the realm were solemnly convened to the capital; and strange as the provisions of the Treaty of Troyes must have seemed they were confirmed without a murmur. Henry was formally recognized as the future sovereign of France. A defeat of his brother Clarence at Bauge in Anjou in the spring of 1421 called him back to the war. His reappearance in the field was marked by the capture of Dreux, and a repulse before Orleans was redeemed in the summer of 1422 by his success in the long and obstinate siege of Meaux. At no time had the fortunes of Henry reached a higher pitch than at the moment when he felt the touch of death. In the month which followed the surrender of Meaux he fell ill at Corbeuil; the rapidity of his disease baffled the skill of the physicians; and at the close of August, with a strangely characteristic regret that he had not lived to achieve the conquest of Jerusalem, the great Conqueror passed away.