William Clito
In 1127, Louis VI was able to make great efforts to help William’s cause.  In January he gave him the royal lands in the French Vexin as a base to attack down the Seine into Normandy. Also he married the French queen’s half sister Joanna of Montferrat. The murder of Count Charles the Good of Flanders on 2 March 1127 gave King Louis a good chance to further William’s fortunes. The king marched into Flanders at the head of an army and on 30 March got the barons of the province to accept William as their new count.