[S] (c. 1390–1439). Elder son of Archibald, 4th earl of Douglas, and Margaret Stewart, daughter of Robert III. The future 5th earl took a leading part in Scottish military assistance to France from 1419. As earl of Wigtown, he joined John Stewart, earl of Buchan [S], in leading Scottish expeditionary forces of 1419 and 1421; in March 1421 Buchan and Wigtown won the spectacular victory of Baugé in Anjou, killing Henry V's brother Thomas, duke of Clarence.
From The Oxford Companion to British History in Oxford Reference.
Subjects: British History.