When I was 19 yrs old I wanted to follow my Dad's bootsteps & be a US Army helicopter pilot.
When I tried to join the Army, I had to sign a form under penalty of perjury that I had no physical limitations I was hiding.
After the main physical, there was an interview with a doctor. (I believe he was a Major) During the interview I was asked about any diseases, limitations, etc. not covered by the standard physical form. I had to tell him I had CF. I was sent packing. 4-F. Need not re-apply.
However; I have seen posts from one man on this forum who had served in the Marines.
If your body is still in good shape, I don't know- you may be able to join. I will tell you this, honesty is the best policy. You are dealing with the Federal Government & you don't want to get caught lying.
Good luck. I'd love to know if you make it or not.