This is page one of the actual comic. You can tell it's the beginning of the 24-hour Staff Duty shift, because the Soldier is eagerly reading the entire phone answering spiel that's in the instruction book, and hasn't yet lost the will to live. More subtle cues set this in the present day: female Soldier in cavalry unit, which wouldn't have happened at all before about 2014 and not in any numbers until the last couple of years; and the fact that she can have her hair in a pony tail and not in what I've been assured is an uncomfortable tight bun. I tried to do the uniforms slightly different, too, to make it OCP vs UCP, but it's not like I ever did anything besides throw some squiggles in to communicate that it's camouflage anyway.