Complex sentence: If reached, this is considered to be the pinnacle of a cadet's career, and because only 0.5% of cadets become Spaatz cadets is a source of great pride for his/her squadron and wing.
Split into simpler sentences: If reached, this is considered to be the pinnacle of a cadet's career. The fact that only 0.5% of cadets become Spaatz cadets is a source of great pride for a Cadet Colnel's squadron and wing.