What will happen to traitors?

Dong Zhuo in history is an example of breaking his word. He killed his old master Ding Yuan for Red Rabbit, stabbed his adoptive father Dong Zhuo for beauty, made friends with Yuan Shu, but killed his marriage emissary, and became intimate with Liu Bei, but took his Xuzhou. The final result of such a renege is to lose everyone's trust. When Lu Bu was defeated and wanted to surrender to Cao Cao, Liu Bei only said a few words about Lu Bu's history. Cao Cao felt that Lu Bu could not stay any longer and was killed in the White Gate Tower.