The PFT: 3 pulls ups. 100 crunches in 2 minutes. 28 minute 3 mile run.
Now, you should also know they've implemented the CFT (Combat Fitness Test) Run half a mile in I believe 5 minutes, maybe less it's been a while since I've done one. Ammo can lift. Which I also don't remember the numbers being because it was based on age, and gender.
Then there was a course you had to run which involved carrying an ammo can a certain distance, carrying a person, dragging a person, and low crawling under a certain time limit. I'm not sure if you need the CFT for boot camp yet or not, but at your age it's going to be at least another 2 years before you can join, so I'd plan on it. If you can't pass that test (the PFT) you go to a place called PCP (Physical Conditioning Platoon).
In that place you exercise all day ever day until you can complete the requirements to go into training.
At age 15 your doing good. Just make sure you stay on top of your cardio and keeping working on your strength and core workouts. In 3years you will be more then ready.
Goodluck Future Jarhead.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.