be one of the most crucial of the First English Civil War, marking the high point of the Royalist advance and leading to the signing of the Solemn League and Covenant, which brought the Scottish Covenanters into the war on the side of Parliament and led to the eventual victory of the Parliamentarian cause. Background When the war started, both sides expected it to be settled by one battle; by the end of 1642, it was clear this was not the case. After the inconclusive Battle of Edgehill in October, the Royalists advanced on London; after they were halted at the Turnham Green in November, Charles established his capital at Oxford. The Earl of Essex, commander of the main Parliamentarian army, was ordered to take Oxford, and on 27 April, captured Reading. Here he remained until mid May, claiming he was unable to advance further without additional supplies, and money. Despite the stalemate outside Oxford, Royalist success elsewhere provided an opportunity for a decisive victory. In the south-west, Royalist commander Sir Ralph Hopton secured Cornwall with victory at Braddock Down in January, before inflicting a serious defeat on Waller's 'Army of the Southern Association' at Roundway Down on 13 July. Arguably the most comprehensive Royalist victory of the war, it isolated Parliament's garrisons in the west; reinforced by troops from Oxford under Prince Rupert, on 26 July they captured Bristol, gaining the second largest city in Britain. Bristol Despite this, Royalist forces were significantly depleted by the battle at Bristol. Suffering over 1,000 men dead, and having exhausted their supplies, the armies were forced to regroup. Even considering this, the capture of Bristol is considered the high-water mark for the Royalist cause during the First English Civil War. With the city captured, however, an immediate dispute occurred over who was to govern it, and this led to Charles travelling there on 1 August to take personal command of the Royalist forces. Upon arriving he called his council of war together to discuss their next move, the primary questions at hand being "first, whether the armies should be united, and march in one upon the next design. And then, what the design should be". The western army, although still strong, refused to advance further to the east due to the presence of Parliamentarian forces within Dorset and Cornwall; the army's commanders felt that, if they tried to push for such a