Will the Citadel have to reverse its hijab decision?

At some point, there will be a lawsuit...and the Citadel will lose and they will have to change their policy.

I doubt they will reverse their decision or be required to. The Hijab would not be able to be properly worn in uniform and not be able to take away from the uniform appearance.

If you want to go to a military styled college, there is a certain standard you are required to conform to. If you do not want to conform to that standard (or set of standards) you can always go to a Civilian, who gives a s#!t styled college. The education is basically the same, but in the civilian one, you can smoke dope, act stupid, and fail without having to deal with your choices for a little while.

CPT Aaron Kletzing wow, this is new for sure. Regulation is regulation, I suppose, there is always a loophole!
According to page 46 of the U.S. Army Regulation AR 600-20, religious headgear may be worn while in the Army uniform if the headgear is subdued in color, can be completely covered by standard military headgear, and does not interfere with the wear or proper functioning of protective clothing or equipment. The other service branches have similar policies, based on Dept. of Defense Directive 1300.17, Accommodation of Religious Practices within the Military Services.