This story is a sequel to Ace Combat: The Changeling War
During the war with the Changelings, the Crystal Empire, with the help of Equestria hires a mercenary air group led by Sunset Shimmer to launch clandestine bombing missions from their base at the Griffon Empire's largest air base to within the Changeling Kingdom. Something the exiled Crystal Empire is unable to do during the war, and something their ally Equestria can't do. The group dubbed themselves "Wolfpack". The risks are great, but the reward is handsome.
Flush with success from that war, the group continues on, providing their services to any country that needs their help.
This is a short sequel to my Ace Combat: The Changeling War fanfic. To get the full story you'll have to read the last 2 bonus chapters of that fanfic. This time the Ace Combat references will be lighter, and some Area 88 ones will be thrown in. 
Good story.
So, just from the first chapter, what exactly does this have to do with Ace Combat.