On March 19, 1094, William at last crossed to Normandy. The campaign which followed was without decisive results. He was no nearer the conquest of the duchy at the end than at the beginning. Indeed, we can hardly say that the campaign had an end. It died away by degrees, but no formal peace was made, and the duchy came finally into the hands of William, not by conquest, but by other means. On William's landing an attempt was made to renew the peace at an interview between him and Robert, but without avail. Then those who had signed the treaty of Caen as guarantors, twelve barons for Robert and twelve for William, were called upon to say who was acting in violation of the treaty. They decided, apparently without disagreement, against William, but he refused to be bound by their verdict. The war which followed was a typical feudal war, the siege of castles, the capture of men and towns. Robert called in once more his suzerain, Philip of France, to his aid, and captured two important castles, that of Argentan towards the south, and that of La Houlme in the north-west. William then took a step which illustrates again the extent of his power and his arbitrary use of it. He ordered a levy of ten thousand men from England to be sent him in Normandy, and when they had assembled at Hastings, Ranulf Flambard, by the king's orders we are told, took from them the ten shillings which each man had been furnished for his expenses, and sent them home. Robert and Philip were now marching against William at Eu, and it was probably by the liberal use of this money that "the king of France was turned back by craft and all the expedition dispersed." About the same time William sent for his brother Henry to join him. Henry had reappeared in western Normandy not long before, and had begun the reconstruction of his power there. Invited by the inhabitants of Domfront to protect them against Robert of Bellême, he had made that place a starting-point from which he had recovered a considerable part of his earlier possessions. Now William sent ships to bring him by sea to Eu, probably wishing to use his military skill against their common enemy. For some reason, however, the ships departed from their course, and on the last day of October he landed at Southampton, where he stayed some weeks. On December 28, William also returned to England, and in the spring, Henry was sent back to Normandy with supplies of money to keep up the war against Robert.