army could not defend the fortified Chippenham, even in "an age... as yet untrained in siege warfare" casts great doubt on its ability to defeat the Danes in an open field, unaided by fortifications. There was little that Alfred could do about the Danish menace between 875 and the end of 877, beyond repeatedly paying the invaders off. Battle This was even truer after the Twelfth Night attack. With his small warband, a fraction of his army at Chippenham, Alfred could not hope to retake the town from the Danes, who had in previous battles (for example at Reading in 871) proved themselves adept at defending fortified positions. So he retreated to the south, preparing himself and his forces for another battle, and then defeated Guthrum and his host. The first we read of Alfred after the disaster at Chippenham is around Easter, when he built a fortress at Athelney. In the seventh week after Easter, or between 4 and 7 May, Alfred called a levy at Ecgbryhtesstan (Egbert's Stone). Many of the men in the counties around (Somerset, Wiltshire, and Hampshire) who had not already fled rallied to him there. The next day, Alfred's host moved to Iley Oak, and then the day after that to Eðandun. There, on an unknown date between 6 and 12 May, they fought the Danes. According to the Life: After the victory, when the Danes had taken refuge in the fortress, the West Saxons removed all food that the Danes might be able to capture in a sortie, and waited. After two weeks, the hungry Danes sued for peace, giving Alfred "preliminary hostages and solemn oaths that they would leave his kingdom immediately", just as usual, but in addition promising that Guthrum would be baptized. The primary difference between this agreement and the treaties at Wareham and Exeter was that Alfred had decisively defeated the Danes at Edington, rather than just stopping them, and therefore it seemed more likely that they would keep to the terms of the treaty. The primary reason for Alfred's victory was probably the relative size of the two armies. The men of even one shire could be a formidable fighting force, as those of Devon proved in the same year, defeating an army under Ubbe Ragnarsson at the Battle of Cynwit. In addition, in 875 Guthrum had lost the support of other Danish lords, including Ivar and Ubba.