Margaret 0f Anjou

Born: 23 or 24 March 1430
Pont-à-Mousson or Nancy, Duchy of Lorraine
Died: 25 August 1482
Anjou, France

Margaret of Anjou was the French-born Queen of Henry VI and a major player on the Lancastrian side of the Wars of the Roses. When her husband began to suffer from a mental illness, Margaret took control. Her conflicts with the Yorkist branch of the Plantagenets led to their open rebellion and the installment of Edward IV on the throne. Margaret fought to regain her husband's throne, which she briefly succeeded in doing from late 1470 to early 1471. She was captured after the Lancastrian defeat at the battle of Tewksbury and released into exile in Anjou, France where she died in 1482.

http://tudorhistory.org/people/anjou/