Kelsi - letter or email? What it sounds like is based on your test scores (and possibly other demographic information because remember they are trying to increase the number of female cadets), WP Admissions sent you a targeted recruiting effort. In the days before internet, WP used to canvas broad swaths of juniors/rising seniors with a mailed invitation to apply. With online applications, more candidates find their own way to WP, but also, better data management lets them target invitations much better. From your signature block, looks like their profile is set just right... Take the invitation as a good sign of their interest in you. Go Army!