I have to ask what makes you and your family say it is a perfect fit?
I am not trying to be rude, I am trying to get how you came to that decision when she is saying it is not a fit in her opinion.
What is her intended major? Have you looked at the mandated curriculum for every cadet, including LAC majors?
Have you approached it from the ....okay I am confused, you loved SLS, but do not want to go, why? It could be something as simple as she doesn't want to live in Colorado. She just didn't feel that connection.
If she is competitive she can go AFROTC scholarship, AND if come fall freshmen year she regrets her decision she can apply again,this time she will be eligible for 1 more slate {ROTC)
FYI, I get it is an amazing education. However, I am with the other posters....this is her life. Do you want to be sitting at the Thanksgiving table and her saying I want to leave after winter break? Do you want to try to convince her again? Màybe she will stay, but at what cost to your relationship? Will she stay for you? Years from now will she blow up at Thanksgiving and blame you for her attending USAFA? Maybe she doesn't blow up, but tells her DH I never wanted this...I did it because I was 18 and didn't want to disappoint.
My biggest regret is I went to a college my Dad said was perfect for me. I never felt at home there. I found an amazing guy and would visit his college, a place that just felt like home. I was successful because of my degree, so in the end Dad was kind of right, but it was 4 years of just keep swimming, swimming swimming.
~ Breaks could not come fast enough for me. I had the student loan noose around my neck, so I had to graduate on time.