Peter Rex, after discussing the various accounts, concludes that it is not possible to declare how Harold died. Harold's death left the English forces leaderless, and they began to collapse. Many of them fled, but the soldiers of the royal household gathered around Harold's body and fought to the end. The Normans began to pursue the fleeing troops, and except for a rearguard action at a site known as the "Malfosse", the battle was over. Exactly what happened at the Malfosse, or "Evil Ditch", and where it took place, is unclear. It occurred at a small fortification or set of trenches where some Englishmen rallied and seriously wounded Eustace of Boulogne before being defeated by the Normans. Reasons for the outcome Harold's defeat was probably due to several circumstances. One was the need to defend against two almost simultaneous invasions. The fact that Harold had dismissed his forces in southern England on 8 September also contributed to the defeat. Many historians fault Harold for hurrying south and not gathering more forces before confronting William at Hastings, although it is not clear that the English forces were insufficient to deal with William's forces. Against these arguments for an exhausted English army, the length of the battle, which lasted an entire day, shows that the English forces were not tired by their long march. Tied in with the speed of Harold's advance to Hastings is the possibility Harold may not have trusted Earls Edwin of Mercia and Morcar of Northumbria once their enemy Tostig had been defeated, and declined to bring them and their forces south. Modern historians have pointed out that one reason for Harold's rush to battle was to contain William's depredations and keep him from breaking free of his beachhead. Most of the blame for the defeat probably lies in the events of the battle. William was the more experienced military leader, and in addition the lack of cavalry on the English side allowed Harold fewer tactical options. Some writers have criticised Harold for not exploiting the opportunity offered by the rumoured death of William early in the battle. The English appear to have erred in not staying strictly on the defensive, for when they pursued the retreating Normans they exposed their flanks to attack. Whether this was due to the inexperience of the English commanders or the indiscipline of the English soldiers is unclear. In the end, Harold's