In 1173 the plot was complete, and Henry's three elder sons all took arms against him, collecting Norman, Breton and Gascon rebels in great numbers, and being backed by a French army. At the same moment the king of Scots invaded Northumberland, and the earls of Norfolk, Chester and Leicester rose in the name of the younger Henry. This was in all essentials a feudal rebellion of the old type. The English barons were simply desirous of getting rid of the strong and effective governance of the king, and the alleged wrongs of his sons were an empty excuse. For precisely the same reason all classes in England, save the more turbulent section of the baronage, remained faithful to the elder king. The bureaucracy, the minor landholders, the towns, and the clergy refused to join in the rising, and lent their aid for its suppression, because they were unwilling to see anarchy recommence. Hence, though the rebellious princes made head for a time against their father abroad, the insurrection of their partisans in England was suppressed without much difficulty. The justiciar, Richard de Lucy, routed the army of the earl of Leicester at Fornham in Suffolk, the castles of the rebel earls were subdued one after another, and William of Scotland was surprised and captured by a force of northern loyalists while he was besieging Alnwick (1173-1174). The war lingered on for a space on the continent; but Henry raised the siege of Rouen, which was being attacked by his eldest son and the king of France, captured most of Richard's castles in Poitou, and then received the submission of his undutiful children. Showing considerable magnanimity, he promised to grant to each of them half the revenues of the lands in which they were his destined heirs, and a certain number of castles to hold as their own. Their allies fared less well; the rebel earls were subjected to heavy fines, and their strongholds were demolished. The king of Scots was forced to buy his liberty by doing homage to Henry for the whole of his kingdom. Queen Eleanor, whom her husband regarded as responsible for the whole rebellion, was placed in a sort of honourable captivity, or retirement, and denied her royal state.