It's the geographic area of being not in the war zone anymore, but not home, so yes, that's the first thing, and it's both social and educational. People are there with the troops they deployed with.
We also have quite robust mental health teaching that goes on there, reminding people of what they learned pre-deployment about what kinds of things they may feel and helping them in how to deal with it. There are also mental health folks available there 24-7 for people to talk to at any time. We would sometimes get referrals right from the third location before people hit the ground at home.