if i take a commission and fail flying training do i have to take a(heaven forbid) ground branch?
No, No, No. If you take a commission and then fail flying training you will be in the same boat as everyone else who fails flying training. I.E youre out fella ! Just because you used to be in the Service doesn't qualify you to remain in the service should the big chop arrive. It happened to a buddy of mine who failed and was more or less booted out straight away.