With the king effectively in custody, York and Warwick were the de facto rulers of the country. While this was happening, the Lancastrian loyalists were rallying and arming in the north of England. Faced with the threat of attack from the Percys, and with Margaret of Anjou trying to gain the support of the new King of Scotland James III, York, Salisbury and York's second son Edmund, Earl of Rutland, headed north on 2 December and arrived at York's stronghold of Sandal Castle on 21 December, but found the opposing Lancastrian force outnumbered them. On 30 December, York and his forces sortied from Sandal Castle. Their reasons for doing so are not clear; they were variously claimed to be a result of deception by the Lancastrian forces, or treachery by northern lords who York mistakenly believed to be his allies, or simple rashness on York's part. The larger Lancastrian force destroyed York's army in the resulting Battle of Wakefield. York was killed in the battle. The precise nature of his end was variously reported; he was either unhorsed, wounded and overcome fighting to the death or captured, given a mocking crown of bulrushes and then beheaded.