Wikipedia:
Henry II, first of the Angevin kings, was one of the most effective of all England's monarchs. He came to the throne amid the anarchy of Stephen's reign and promptly collared his errant barons. He refined Norman government and created a capable, self-standing bureaucracy. His energy was equaled only by his ambition and intelligence. Henry survived wars, rebellion, and controversy to successfully rule one of the Middle Ages' most powerful kingdoms.

Henry was raised in the French province of Anjou and first visited England in 1142 to defend his mother's claim to the disputed throne of Stephen. His continental possessions were already vast before his coronation: He acquired Normandy and Anjou upon the death of his father in September 1151, and his French holdings more than doubled with his marriage to Eleanor of Aquitane (ex-wife of King Louis VII of France).