Events moved rapidly after the fall of Nicaea. By 26 June some of the crusaders were already on the march. Robert with his habitual slackness took a more leisurely leave of the Emperor[65] and did not advance till two days later. But he quickly came up with the rest of the forces at a bridge over a small tributary of the Sangarius; and from that point the whole crusading host moved forward on the morning of 29 June before daybreak.[66] Either by accident or design the army was separated into two divisions,[67] which advanced by different, but roughly parallel, routes. At the head of the smaller force, mainly composed of Normans, marched the Norman leaders, Robert Curthose, Bohemond, and Tancred. Raymond, Godfrey, Hugh of Vermandois, and Adhemar, bishop of Le Puy, with their followers made up the larger division. As the Normans pitched camp on the second evening their scouts reported the enemy’s presence ahead, and special watches were set to guard the tents; but the night passed without incident. When, however, on the following morning (1 July) the march was resumed, the way was soon barred by the enemy in force under the command of Kilij Arslan. The Normans hastily prepared for battle; and towards eight or nine o’clock an engagement was begun which continued with uninterrupted fury till well after midday. Though the Normans fought valiantly, they could not long maintain the unequal contest. The mounted knights were hurled back in disorder upon the foot soldiers; and the heroic efforts of Bohemond and Robert to rally their forces and resume the offensive were of no avail. The crusaders, greatly outnumbered, and terrified by the outlandish modes of warfare practiced by their enemies, were overwhelmed and thrown back in wild confusion upon their camp. It was a desperate moment. The Christian forces were packed together “like sheep in a fold.” Priests were praying, knights were prostrate confessing their sins. The panic was general. But suddenly, when all seemed lost, relief came. Earlier in the day a messenger had been despatched to the crusaders of the other division, who were advancing at some distance by a separate route. When they learned of the desperate plight of the Normans, they rushed to arms, and, by hard riding across country, arrived upon the scene of battle barely in time to save their companions from annihilation. Strengthened by these reënforcements, the Normans quickly re-formed their battle order and renewed the contest; and the Turks, unexpectedly confronted by an enemy doubled in numbers, turned in flight and were swept from the field. The crusaders pursued them till nightfall, plundered their camp, and took quantities of booty.[68]

There can be no doubt that Robert Curthose fought bravely, as befitted one of his ancestry,[69] on the field of Dorylaeum. But the accounts, nearly contemporary though they be, which picture him as the supremely brave leader, whose heroic action checked the rout of the Christians and saved the day, belong rather to the realm of legend than of sober history.[70] A just estimate based upon strictly reliable sources must recognize that Robert divided the honors of Dorylaeum with Bohemond and the other leaders, but must assign him a part in the battle somewhat subordinate to that played by the great leader of the southern Normans.

The rout of the Turks at Dorylaeum opened the way through Asia Minor; and on 4 July,[71] after a two days’ halt to rest and to bury the dead,[72] the crusaders entered upon the long march to Antioch, the great Seljuk stronghold in northern Syria.[73] No serious opposition was encountered from the enemy; and on 20 October,[74] after three and a half months of varied hardships, they arrived at the so-called Iron Bridge (Djisr el-Hadid) over the Orontes a few miles above Antioch. Robert Curthose led the vanguard[75] which encountered outposts of the enemy at the bridge and defeated them in a sharp engagement; and that night the crusaders camped beside the river.[76] Next day (21 October) they pushed on to Antioch and took up their positions before the city.[77]

The siege of Antioch was a problem fit to try the resources, spirit, and endurance of the greatest commander. Its massive walls and towers, far superior to anything then known in western Europe, rendered it impregnable by assault. It was held by a strong garrison under the command of a resourceful emir; and the besiegers were in constant danger from a sortie in force. Moreover, the beleaguered garrison was not to be left without assistance; and more than once the crusaders had to meet and drive off a relief force in greatly superior numbers. And finally, the food problem soon became so acute as to threaten the besiegers with starvation; and to hunger were added the hardships of the winter season. Plainly this was not the kind of warfare which appealed to the easy-going, pleasure-loving Robert of Normandy. During the early stages of the siege, while the abundant supplies of a fertile district still held out, he played his part with courage and spirit, as, for example, when he joined with Bohemond and Robert of Flanders in a victorious fight against the Turks on the Aleppo road near Harim in November.[78] But when, in December, the crusaders began to feel the pinch of famine,[79] Robert could not withstand the temptation to withdraw to more pleasant winter quarters at Laodicea.[80]

Though the preaching of the Crusade had aroused little enthusiasm among the upper classes in England, it had met with a curious response among the English seamen. Assembling a considerable fleet, they had passed the Straits of Gibraltar and arrived off the Syrian coast well in advance of the crusading forces which were making their way across the highlands of Asia Minor; and in concert with the Emperor—who, it must not be forgotten, was coöperating with the crusaders both by land and sea—they had captured Laodicea and established themselves there before the land forces had arrived at Antioch. Well stocked with provisions from Cyprus, and protected from pirates by the English fleet, which secured its trade communications with the islands, Laodicea offered tempting quarters for one who had tired of the rigors of the winter siege at Antioch. Moreover, the English mariners appear to have been menaced in their possession by wandering bands of the enemy in the surrounding country and in need of reënforcements. Accordingly, they appealed to Robert of Normandy as their most natural lord among the crusading chieftains, and besought him to come to Laodicea as their protector.

Accepting this invitation with alacrity, Robert retired from Antioch in December 1097, and, joining his friends at Laodicea, gave himself up to sleep and idleness, content with forwarding a part of the abundant provisions which he enjoyed to his suffering comrades at the siege. The situation of the besiegers, however, was precarious, and they could not long remain indifferent to the absence of so important a leader as Robert. Soon they summoned him to return; and when their appeal met with no response, they repeated it and finally threatened him with excommunication. Thus pressed, Robert had no choice but to yield, and, very reluctantly turning his back upon the comforts of Laodicea, he returned to the hardships of the siege.

Robert was back at Antioch for the crisis of 8 and 9 February 1098, which was brought on by the arrival of Ridwan of Aleppo at the head of a large Turkish relief force. He attended the war council of 8 February which determined upon a plan of action;[81] and next day, while Bohemond and the mounted knights were winning their splendid victory over the forces of Ridwan,[82] he assumed command, along with the bishop of Le Puy and the count of Flanders, over the foot soldiers who remained behind to maintain the siege and guard the camp.[83] And though the Turkish garrison attempted a sortie in force from three gates, Robert and his comrades kept up a hard but victorious struggle throughout the day, and at nightfall drove the enemy back within the walls.[84]

From the defeat of Ridwan of Aleppo until the capture of Antioch, 3 June 1098, we lose sight of Robert completely; and it must remain a matter of doubt whether he was privy to the secret negotiations by which Bohemond, corrupting a Turkish guard, succeeded at last in opening the gates of the impregnable fortress.[85] Robert was certainly present at the capture of Antioch[86] and played his part honorably in the trying days which followed.

The month of June brought the crusaders face to face with the gravest crisis with which they had yet been confronted. The citadel of Antioch still held out against them; and, within two days after their victorious entrance into the city, advance guards of a vast Moslem army under the command of Kerboga of Mosul arrived before the gates. By the 8th of the month the Franks were compelled to burn their outworks and retire within the walls, themselves to stand a siege.[87] Though not especially mentioned, Robert doubtless took his part in the all-day struggle of 10 June; and when, next morning, it was discovered that a panic was spreading through the ranks, and that some of the forces, followers of Robert among them, had already let themselves down over the wall and fled,[88] he promptly joined with the other leaders in the solemn oath by which they mutually bound themselves to stand firm to the end.[89] And when finally, on 28 June, it was decided to stake all on a battle with Kerboga in the open, he led the third division[90] in the action and shared in the greatest victory of the Christians during the First Crusade. A few days later he attended the council at which it was determined, in view of the summer heat and the scarcity of water, to postpone the advance upon Jerusalem until 1 November;[91] and with that the leaders parted company.

How Robert passed the summer months, it is impossible to say. Probably he sought cooler and more healthful quarters away from pest-ridden Antioch. But he was evidently there again on 11 September, for he joined the other leaders in the letter to Urban II in which they recounted the progress of the Crusade, reported the death of Bishop Adhemar of Le Puy, and urged the Pope himself to come and join them.[92] Robert was certainly at Antioch on 1 November, the day set for the general advance upon Jerusalem.[93]