The Barons' War is the only occasion in English history, except the great civil war of the seventeenth century, in which a national party in arms against the crown won a great victory in the field, and became dominant in consequence, at least temporarily. It is an interesting coincidence that the blunder which lost Lewes, the eagerness of a youthful prince to pursue his routed opponents, regardless of the general fate of the battle, should have been repeated, not once only, by his descendant four centuries later. The hastiness of Rupert prevented Edgehill from being a victory, and definitely lost Naseby, the final battle of the war. Otherwise Lewes has no great military interest. It exhibits the disastrous results to a defeated army of having a river in its rear, and (possibly) the value of a reserve. But the two armies were alike in equipment, in straightforward hard fighting all along the line, in the preponderance of mailed horsemen. Of missile weapons we hear nothing, except that _balistarii_ assisted in defeating Richard of Cornwall: the word is often used to denote cross-bowmen, and probably has that meaning here. The strange thing is that there should be no trace of the archers, who only thirty years later played an important part at Falkirk. The battle of Lewes made Montfort master of England, and gave him the opportunity of summoning the famous assembly, to which for the first time the towns sent representatives. His rule was not very successful: hampered as he was by the natural hostility of the king and his adherents, and by the selfish jealousy of some of his own party, he would have been more than human if he had overcome all his difficulties, and laid himself open to no imputations of personal love of power. The fact that he had the king in his hands, virtually a prisoner, made his position especially difficult. So long as the king was in his power, he could not expect the royalists to acquiesce in his new policy: to let him go was to give up his one safeguard. The earl of Gloucester, the most powerful of his supporters, broke away from him, chiefly out of personal jealousy. Earl Warrenne and others of the fugitives from Lewes landed in South Wales with a strong force in the spring of 1265. Montfort was at Hereford, trying to quiet the disordered marches of Wales, the king and prince Edward with him. From Hereford the prince made his escape on May 28, and became naturally the head of the royalist party. Bristol, Gloucester, Worcester fell into the hands of prince Edward; the earl was unable to cross the Severn, and was obliged to wait until his second son Simon could bring an army to his assistance. Simon had been besieging Pevensey, and was a long time in reaching Kenilworth, his father's principal stronghold. The castle was too small to contain his troops, and Simon with incredible carelessness allowed them to remain outside without keeping any guard, apparently for two or three days at least, since Edward at Worcester