Assuming that the personnel plus-up stays on track, the question is what ought those personnel be doing? I think that the answer is advising, whether or not a "corps" is the force structure answer.

Reasons:
1. Too many failed/failing/incompetent states that desperately need assistance bolstering their security capacity. This can be done after a MCO or even better, before and ILO.

2. Indiginous forces are the only ones that can truly be successful in small wars of the future. OBTW idig civil governance capabilities also need to be developed/improved, but let's stay focused on security forces.

3. U.S. and major allies have reduced ground forces end strength to the point where we are incapable of going it alone without coalition partners. These partners, whether host nation or allies, need to be capable, ergo need to be developed. After Vietnam, we pushed our advisory capacity into SOF. Now SOF is overwhelmed by the magnitude of the advisory mission AND busy performing the sexy, hi-pri SOF missions: DA, CT, SR, etc.

4. Current security assistance and FID restrictions limit our ability to do the advisory piece half vast worth a darn.

Mission is critical. Resources are scarce. Need to find a peace dividend. We're in trouble.