History
In order to took vengeance on Wolverine, Malcolm Colcord lead the Sentinels to attack the Xavier's School for Gifted Youngsters. While the X-Men fought against them, Mesmero and Sauron snuck into the mansion and used their combined hypnosis powers to take control of Xavier. Iceman and other X-Men surrendered to save Xavier, but then Wolverine arrived Colcord ordered the Sentinels to kill all of them right in front of Wolverine.[1]