When I did my background check, they wanted to know what I have been doing for the past 10 years. Where I went to school, work, where I‘ve lived and if I‘ve left the country, where, when and how long. I summed all that up on my application (had to add a couple extra sheets). If you were a cadet 10 years ago, I doubt they would look into that much, though they would like to know the corps/squadron name, location and number. Cadet units are supposed to keep your file on hand for five years after you leave, then they are destroyed. Other than that, I don‘t know. After they take that info and forward it to CSIS, it‘s all a black box.