It's a little complicated. [Affairs of state and all that] But... simply declaring a wish for peace doesn't always mean that peace will follow. Sometimes, you have to be willing to fight to protect the people and the home that you love.
Still... on the opposing side, my-- my sister, she...
Morgana wished to kill me and take the throne in Camelot. As such, I had to prevent it. By then it'd... it was too late to try to reason with her again. She was beyond my ability to reach her. [And sometimes he thinks he should have tried harder for that.]