Camelot

Camelot was the castle of King Arthur. It was also the home of Merlin, Jason Blood and Sir Justin.

Justice League
Morgaine Le Faye hoped to overthrow Arthur's rule so her son Mordred could rule the kingdom. She organized an army of monsters to conquer King Arthur's lands. Arthur's forces initially held out against the invading armies, but unknown to him, Le Faye had successfully planted a traitor in his court.

Rallying her troops, Le Faye launched a final assault on Camelot. During the battle, Jason Blood opened the gates of Camelot to her invading armies, betraying Arthur and his people. Having been seduced by the witch, he thought that when Morgaine claimed Camelot they would rule together.

Once the castle had been breached and her victory was assured, Morgaine promptly betrayed him too. She wanted the throne for her son Mordred and no one else.

As her forces swept through the castle, the wizard Merlin, realizing that all was lost, spirited away the Philosopher's Stone and hid the magical artifact in an arc at Castle Branek.

Merlin also survived the battle long enough to literally curse his betrayer, bonding Jason Blood with a creature from the pit and forcing him to hunt down Morgaine in an effort to avenge Camelot's defeat at her hands.

While Camelot ultimately fell to Le Faye's invasion, her victory proved to be pyrrhic as she was unable to crown her son king without the Philosopher's Stone and she would later spend centuries in an ultimately futile search for it, while the kingdom she and her son had hoped to rule fell into ruin and was eventual lost to history.

Justice League

 * "A Knight of Shadows"

Justice League Unlimited

 * "Patriot Act"