Reminds me of the book Triple Detente by Piers Anthony https://www.goodreads.com/book/show/263431.Triple_Detente https://www.goodreads.com/book/show/263431.Tri

Reminds me of the book Triple Detente by Piers Anthony https://www.goodreads.com/book/show/263431.Triple_Detente https://www.goodreads.com/book/show/263431.Triple_Detente One of the core logical premises of the book is how three groups can handle an unsteady alliance where each group is primarily interested in saving their own people.