An imperial decree ordered him to be executed. He did not resist or surrender. He just wanted to take off his armor and become a person with no purpose and no monument. But the people who helped him along the way helped him find the answer in his heart. In the end, he died in the capital but his monument stood in everyone's heart.
The rivers and lakes are huge, big enough to hide a living dead person.
The world is also very small, so small that a person who is tired of killing people will not be able to avoid grudges after all...