Is it History-related or Hetalia-related? If yes, then you can, If it is not, then we will not accept the request. If it is unclear how it is related, please specify the connection in your affiliation request.
Well, I think how many fans of APH have said that this anime / manga made history study more ficiently like a group like mine that has the intention and create stimulate of studying in exchange for points, gifts and other prizes. It is related to general matters as history.
The group rules doesn't say anytthing specific about not accepting MMDs, so I guess we might accept it. Though the rules state it has to be "your own artwork".