James Francis Ryan, the youngest of the four Ryan brothers, and the only one of the four to survive world war 2. seventy-eight or so years later he died an old man and at peace. In Equestria The Griffon Kingdom has declared war with Equestria and Equestira is on the brink of losing, Celestia now has no choice but to call upon a war veteran from
Earth. Six days later, Ryan awakens to find himself still human, but now fighting a war that will change him and all of Equestria to The Griffon Kingdom forever…

(Inspired off of the tear jearking, in my opinion, movie saving private ryan.)
(WARNING:Bad grammar and spelling is ahead. If you see a mistake let me know how to fix it in the comments and I'll get to it at some point.)