During Alice's journey through the Pale Realm, she becomes entangled in the eternal conflict between White and Red Kingdoms when she stumbles upon a Red troupe abducting the White Queen. The White King bargains with Alice where, in return for her services the White King would promise a part of the powerful Eye Staff, a requirement to breach an otherwise impenetrable curtain of souls and access Queen of Hearts Land.
The White King is tethered to the door of the Queen of Hearts' castle and the only way to get in is by killing him. He accepts this and tells Alice that he will show the Queen the meaning of sacrifice. Alice proceeds to kill him, and he ends up in broken pieces in and around the door.
After the Dollmaker's defeat, Alice is not shown resurrecting anyone (the Cheshire Cat also mentions that they can't go back home). Since Kings and Pawns are the only chess pieces that can not be resurrected, the damage done to both the Red Realm and the Pale Realm may be permanent.
In the Extra Content, Alice remarks how the White King reminds her of her father. He and the White Queen are possibly confirmed Wonderland representations of her very own parents. In the second Alice book, however, Alice speculates that the Queens and Humpty Dumpty are Dinah and her kittens.