The Anjou courtship as foreign policy
From 1579 to 1582 Elizabeth publicly courted Francis, Duke of Anjou, the French king's brother, exchanging gifts and even pledging marriage to him with a ring in 1581, while never concluding the match. The courtship kept France aligned with England against Spain and let Elizabeth fund Anjou's campaign in the Netherlands at arm's length. When it had served its purpose, she let it lapse. It is a concrete case of a courtship run as a sustained diplomatic operation rather than a personal romance.