For 10 points, name this chaotic conflict during which "Christ and all his saints slept," a power struggle between Stephen of Blois and his cousin, the Empress Matilda.
A battle related to this conflict saw Archbishop Thurstan raise up forces to fight the Battle of the Standard. An ancestor of Maynard Keynes apparently captured one of the leaders of this war during one battle.  The death of Eustace IV opened up the possibility of a peaceful resolution to this conflict. A story about this conflict tells of a figure camouflaged in white escaping Oxford Castle just before Christmas. During this war, Robert of Gloucester was captured after the Rout of Winchester and was later swapped for a man captured at the Battle of Lincoln. Its origins stem from William Adelin's death in the (*) White Ship disaster, which led to a controversial replacement as heir to the throne. This conflict ended with the Treaty of Wallingford, which recognized that Henry II would inherit the monarchy. For 10 points, name this chaotic conflict during which "Christ and all his saints slept," a power struggle between Stephen of Blois and his cousin, the Empress Matilda.
A battle related to this conflict saw Archbishop Thurstan raise up forces to fight the Battle of the Standard.
The {Anarchy} [accept {Nineteen}-{Year Winter}, I guess {you can} accept {Civil War} Between {Stephen} and {Matilda} until {their} names are mentioned]