I think he already lost his sense of identity. Perhaps too used to just following orders.
Bart (weeping): Mart, you are an extremely talented person. U are more than capable to lead a kingdom on your own. You need more space to grow And we will cover each other in time of needs
Mart (confidently): Aye Sir!
Mart (pitifully): My kingdom is getting smashed by Pan. There goes my age. I already got nothing to fill up in my portfolio for Age 71. Can I join you back, your honorable?
Bart: Alright, but you need to form back a new kingdom next age. A lot of enemies next age. I need you badly.