The Last Battlefield
The Last Battlefield is a story written by Kagaku no osomatsu. It ran in Issue 52 at http://s2b2.livejournal.com/295942.html, and is mirrored at http://www.shousetsubangbang.com/mirror/the-last-battlefield/.
From fairyninjas.wordpress.com: "Another tale dealing with living on after war. This one a medieval Commander who had never let himself play with his ‘favorites’ before."