Korora
Let's keep calm here...
Crystal War Timeline: Wind Rider was supposed to guard Seaddle, but made a foolish and insubordinate charge meant to garner glory for himself. He himself was mortally wounded, his command took heavy casualties (many KIA, many WIA, and many captured), and the token guard he left in Seaddle was powerleinssufficient to stop Sombra's forces. Oh, and this was when Rainbow Dash lost her wing.