Is not possible, 

if you don't like your marshal , you can always leave and find another league !

I understand you, but the players do not want to leave, And the dominus and the viceroy play by themselves For all the presence in the game they did not receive any instructions on how to play management, And the players also play by themselves. Replace it and you will see for yourself how the alliance began to develop after the replacement

Until the marshal is safe ( alive )  and active , you and your mates can't do nothing , you can't substiute him !   

ps:  is he the founder of the league ?  if is not him but you are the founder you can contact the suport and to ask that if is possible and how you can recuperate back your league created by you !

Thank you. We understand you

If we add additional information for you for your analysis and decision-making. The previous domain did not consult with the players of the alliance and appointed him instead of himself And went to another alliance. We agree with you that he plays by himself and does not deal with the leadership of the alliance. How do we play if there is no plan and tactics for the development of the alliance. So now every player is playing for himself.

You can check his correspondence for the entire time of his leadership, there was not a single order for the alliance, All hope is on you.

Hello lords, please forward this request to the Support , but as i said untill the marshal is alive and active i don't think can be changed !

Here is the link for Support :

https://social-support.plarium.com/hc/en-us/requests/new?fbclid=IwAR3BQvJCine1yBvcEA36YRyEptBiql9BrsUsBZlB-J0g0Sy6cZeuI4RIYgM

I wish you good luck and enjoy the game !