I don't know much about this tab other than it exists, so I would like to as three questions about it:

1. What date was this tab created?
2. What training do you have to go to earn it?
3. Do you have to be in the 10th Mountain Division to have it?

It is my understanding that the 10th Mountain Division is the only unit authorized to wear the tab. They wear it for traditional reasons much like the 101st who still wears the "Airborne" tab.