On arrival in Scotland much time was spent gathering Scottish troops together for the campaign on England and the French were delayed for some months collecting supplies. The army thus did not move south until July, ravaging villages and farms in the region of the River Tweed before besieging Wark Castle and burning it to the ground. The allied army then continued south through Northumberland and there burnt villages, towns, farms and castles across their line of advance in a large chevauchée. The English responded with an army led by King Richard II which advanced against the allied force and offered battle. The French prepared to fight but their Scots allies retreated, leaving the French exposed, and they were consequently forced to retreat as well. Outside Edinburgh the Scottish army dispersed and the inhabitants of the city fled north, leaving the French alone in the city. Realising that his force was outnumbered and without food or help, Vienne took the army south, rounding the English on the night of 10 August and reentering Northumberland for further looting, attacking Carlisle but being unable to break through its walls. As the Franco–Scottish army returned northwards it was attacked by an army under Henry Percy which destroyed the army's wagon train and took many prisoners. When the defeated French returned to Edinburgh the Scots refused to provision the French army and many men died of disease or starvation. Late in the year the French army boarded ship and returned to Flanders, bankrupt and defeated.