thumb|left|Edward III invades Scotland, from an edition of Froissart's Chronicles In April 1333, Edward III and Balliol, with a large English army, laid siege to Berwick. Archibald Douglas attempted to relieve the town in July, but was defeated and killed at the Battle of Halidon Hill. David II and his Queen were moved to the safety of Dumbarton Castle, while Berwick surrendered and was annexed by Edward. By now, much of Scotland was under English occupation, with eight of the Scottish lowland counties being ceded to England by Edward Balliol.
thumb|left|Edward III invades Scotland, from an edition of Froissart's Chronicles In April 1333, Edward III and Balliol, with a large English army, laid siege to Berwick. Archibald Douglas attempted to relieve the town in July, but was defeated and killed at the Battle of Halidon Hill. David II and his Queen were moved to the safety of Dumbarton Castle, while Berwick surrendered and was annexed by Edward. By now, much of Scotland was under English occupation, with eight of the Scottish lowland counties being ceded to England by Edward Balliol.