As MikeF points out, its critical to define the problem before seeking a solution...

A few assumptions -

- a framework of QRF/combat, logistic and air support will remain far beyond a withdrawl
- the withdrawl will not occur under enemy pressure -- we'll turn and fight, before we jump on the last helicopter evacing the embassy
- significant advisor footprint

So what we are looking at is a reduction in force (combat & support) as opposed to a complete withdrawl.

Off the top of my head, it'd look like is...

- Begin with a thinning of forces (as is happening now) either transfer of land to IA with QRF capability or reduction of BDE to BN then transition

- retain three BNs of QRF in country (north-center-south) each with heavy light mix and lift assets

- Plus establishment of a Camp Doha type facility at TAJI - with Discom and ready set responsibilities

Wow think of all the time I just saved GEN Petraeus and his staff