SF Signal has published my essay "The Political Battlefield of Military Science Fiction," which examines the political issues surrounding this subgenre in the U.S. The essay was originally published in the Czech SF magazine XB-1. I should also note there's a wonderful anecdote in the comments section about the first time Robert Heinlein met Joe Haldeman.
Aliette de Bodard also has a follow-up post to my essay in which she discusses how Americans use the word “political” to refer to something which, to her, is not political (i.e., whether or not war is justified, which to Aliette is an ethical issue, not a political one). A great point and one I'll have to think about.