This is very old concept, sorry for ugly artstyle, I hate it.

Concept of Wonderbolts division armor during Crystal War. These flyers was elite commando of Equestrian Air Forces, best of the best. The best flyers of Equestria was invited to join their ranks and was trained just about a month but already become officers that always on the edge of the attack. Breaking through the defense, landing right in the ranks of the enemy, bombing, special operations in the rear is what this unit is famous for.

Rainbow Dash was invited too and without delay joined to training program. And become a Wonderbolt by a different way.