From a post to Baen's Bar Honorverse dated June 11, 2008:

Where is the RMMC boot camp located?

    I'd like to know if the Boot Camp or Recruiting Depot is on the same place as Saganami Island Naval Academy.


    Marine boot camp is not at Saganami Island. It's at ummpfff in the Duchy of Tum-te-tum-te-tum on Gryphon. [g] One of these days the information may become significant in one of the books. Until then, I'm reserving the details in case it ends up making sense from a story-telling perspective to put it somewhere else. Most writers, no matter how far they plan ahead, will tell you that they reserve the right to make changes at any moment up until publication for exactly that reason.