If you received the Billy Mitchell Award from the Civil Air Patrol you will enlist as an E-2. If you want to get your E-3 there are several things you can do in addition to providing your CAP award (you only have to do one of the following, you don't have to do everything):
*One year of JROTC (doesn't matter which branch, a valid high school transcript is all we need)
*Complete the pre-Basic Training task list (passing a full Army Physical Fitness test and completing all Future Soldier tasks on futuresoldiers.com while you're in the DEP)
*Obtain 24 semester hours of college
*Earn the Girl Scout Gold Award certificate
*Get the Naval Sea Cadets Corps NSCADM 024 (Certificate of Advancement)
*Refer one person to the Army that enlists prior to you shipping
ADDED for Rukah 981: You're wrong about it having to be three or four years of JROTC for the Army. It may be that way for the Air Force, I don't know. One year gets you E-2 and three years gets you E-3. If the asker didn't have the award from the CAP she would need three years for JROTC instead of one. My source is below right from Army Regulation 601-210, chapter 2-18a:
(2) Has completed 1 or 2 years of Junior ROTC (JROTC) or a National Defense Cadet Corps (NDCC) Program may enlist at any time at pay grade PV2.
(3) Has completed 3 or more years of JROTC or a NDCC Program may enlist at any time at pay grade private first class (PFC).
This paragraph states that you can combine the different things to get E-3:
c. The applicant may enlist at pay grade PFC if they meet any 2 requirements in paragraph 2–18a(2), (5), (6), (10), (11), (12), (13), or (14), or 2–18b(1) or (3). (For example, applicant has 24 semester hrs and provides one referral that enlist= PFC; this example combines 2–18a(6) and 2–18 (1)).
She would be getting PFC by combining (2), which is the year of JROTC and (10), which is the Billy Mitchell Award from the CAP.
I also posted a link in the additional information in case you think I'm wrong.