The Marine Corps told me that for max points for promotion I needed to be able to do the following:
1. Run 3 miles in less than 18 minutes. (6-minute miles)
2. Do 20 pull-ups.
3. Do 80 sit-ups in 2 minutes.
I was able to max the PFT every time, and, IMO, the run is what mattered. If you can run 6-minute miles for 3 miles, you are going to be in shape. Period.
It is my belief that running is the most important skill to have. Mainly to get away from the fight in the first place....