I was looking back at the recent strips, and I realized we have more hints than we've explored. The key phrase is this
bit of dialogue:
"You want Nimock's account of the pinkhippist plowshare project, 'Peethree'."
with the notes that
"The term "pinkohippist" has a long history, beginning with its origins as an longer, multi-word ideological slur. The shortened word quickly became taboo, was legislated as "hate speech," and then re-emerged in casual conversation after a sesquicentury or so of obscurity. Its use in the above account refers to one of the several political movements that adopted the term as an official name. "
I'm not at all certain what the term pinkohippist is supposed to refer to exactly, but it seems likely that it is a derogatory term for some sort of hippie movement. Combine this with 'plowshare project', which in context may be a reference to "Beat your swords into plowshares", Isaiah 2:4, and we have the distinct possibility that Credomar was indeed a weapon of some sort, with the inhabitants deliberately being placed on it simply to stop it from being used, or perhaps to make a better use of it.
The question that follows is why Credomar is ashamed of their past. Either (a) they have become more militant, and don't want to be descended from a bunch of hippies, or (b) said ancestors were ashamed of the militarized past and the current occupants are therefore simply unaware of this part of life, despite apparently being all gunh-ho about violence again.