Then the king, full of wrath and grief, agreed thereto, and sent letters throughout the realm to summon all his knights, and went with a vast army to besiege the Castle of La Joyous Garde. And Sir Lancelot, with his knights, mightily defended it; but never would he suffer any to go forth and attack one of the king's army, for he was right loth to fight against him. So when fifteen weeks were passed, and King Arthur's army wasted itself in vain against the castle, for it was passing strong, it chanced upon a day Sir Lancelot was looking from the walls and espied King Arthur and Sir Gawain close beside. "Come forth, Sir Lancelot," said King Arthur right fiercely, "and let us two meet in the midst of the field." "God forbid that I should encounter with thee, lord, for thou didst make me a knight," replied Sir Lancelot. Then cried Sir Gawain, "Shame on thee, traitor and false knight, yet be ye well assured we will regain the queen and slay thee and thy company; yea, double shame on ye to slay my brother Gaheris unarmed, Sir Gareth also, who loved ye so well. For that treachery, be sure I am thine enemy till death." "Alas!" cried Sir Lancelot, "that I hear such tidings, for I knew not I had slain those noble knights, and right sorely now do I repent it with a heavy heart. Yet abate thy wrath, Sir Gawain, for ye know full well I did it by mischance, for I loved them ever as my own brothers." "Thou liest, false recreant," cried Sir Gawain, fiercely. At that Sir Lancelot was wroth, and said, "I well see thou art now mine enemy, and that there can be no more peace with thee, or with my lord the king, else would I gladly give back the queen." Then the king would fain have listened to Sir Lancelot, for more than all his own wrong did he grieve at the sore waste and damage of the realm, but Sir Gawain persuaded him against it, and ever cried out foully on Sir Lancelot. When Sir Bors and the other knights of Lancelot's party heard the fierce words of Sir Gawain, they were passing wroth, and prayed to ride forth and be avenged on him, for they were weary of so long waiting to no good. And in the end Sir Lancelot, with a heavy heart, consented. So on the morrow the hosts on either side met in the field, and there was a great battle. And Sir Gawain prayed his knights chiefly to set upon Sir Lancelot; but Sir Lancelot commanded his company to forbear King Arthur and Sir Gawain. So the two armies jousted together right fiercely, and Sir Gawain proffered to encounter with Sir Lionel, and overthrew him. But Sir Bors, and Sir Blamor, and Sir Palomedes, who were on Sir Lancelot's side, did great feats of arms, and overthrew many of King Arthur's knights. Then the king came forth against Sir Lancelot, but Sir Lancelot forbore him and would not strike again.