I think of it in terms of percieved exertion, or maybe look at my
heart rate. A persons level of fitness also plays a part. Someone very out of shape will find a 10min mile pace extremly challenging.. so then for them it will feel like 'running'.
I consider 10min mile pace as a 'jog' as HR will stay at about 120-130 (unless there are hills of course). The percieved exertion is low: I could probably keep this up for a long time, if I didnt
fall asleep first.
When I am 'running' my HR will usually be 160 or more. Right now, since i am not in great running shape, a pace of 9minute miles would probably get me here.
I havent worn my monitor for sprints yet, but i suspect 180 or more, and maintainable for only short bursts.
According to that army site i need to do the 2miles in 15:36 for 100 points. I don't think i could do that right now, but I will work on it!