Does anybody know how long a helicopter pilot has to serve in the Air force, or the other military branches?

Why are you asking?  If you want to be a military pilot so badly, why would you want to leave?

 

What are your actual goals?

My goal is to become a fighter pilot in the USAF, but is for some reason that does not work out, I would really like to know my other options. I just don't want to "put all my eggs in one basket" if you know what I mean. Besides, it would be very foolish to join the AF and not know how long I am in for.

The standard commitment for pilots in the USAF is 10 years.

Thanks, I appreciate your help.