[1] He fought for King Henry II Plantagenet in 1168, and succeeded his father in 1173.
[1] In the early 1180s, Andrew took part to an armed pilgrimage to the Holy Land and came back to Brittany a few years later.
[1] In 1196, the duchess of Brittany, Constance, was abducted and imprisoned by her husband Ranulf de Blondeville.
He agreed to send his daughter Emma, who was his only heiress at the time, as an hostage to Richard the Lionheart, in exchange for de Constance's release.
Andrew first married, before 1173, Matilda of Mayenne,[1] daughter of Geoffrey III, Lord of Mayenne, and Constance of Cornouaille (daughter of Duke Conan III, Duke of Brittany).