Often NG troops will deploy with AD c9ubterparts and will be awarded SSIFWTS for the Active component. Have any of the guard sent to the capitol previously deployed with 10 Mountain, they would have the 10th Mountain Crossed Swords patch on their right arm.
Just something i thought of. Wars are won through deception.
Its unlikely they would as a unit insignia, but they could wear it if they deployed with the 10th Mountain previously.