In accordance with the Treaty of Edinburgh–Northampton, Joan was married on 17 July 1328 to David, the son and heir of Robert the Bruce, at Berwick-upon-Tweed.[3] She was seven years old and he was four at the time of their marriage.[4] Their marriage lasted 34 years, but it was childless and apparently loveless.[5]
In the spring of 1333, Joan's brother, Edward III of England, invaded Scotland.[7] After his victory at the Battle of Halidon Hill near Berwick-upon-Tweed in July 1333, David and Joan were sent for safety to France.[8] They reached Boulogne-sur-Mer in May 1334, where they were received by Philip VI, her mother's cousin. Little is known about the life of the Scottish king and queen in France, except that they took up residence at Château Gaillard and Philip treated them with regard.[9]
Meanwhile, David's representatives had obtained the upper hand in Scotland, and David and Joan were thus able to return in June 1341, when he took the reins of government into his own hands.[10] David II was taken prisoner at the Battle of Neville's Cross in County Durham on 17 October 1346,[11] and remained imprisoned in England for eleven years. Although Edward III allowed Joan to visit her husband in the Tower of London a few times, she did not become pregnant.[12] After his release in 1357, she decided to remain in England.[12] Joan was close to her mother, whom she nursed during her last days.[13]
Maclagan, Michael; Louda, Jiří (1999), Line of Succession: Heraldry of the Royal Families of Europe, London: Little, Brown & Co, p. 17, ISBN1-85605-469-1