When Comes the Dawn — Brenda Bancroft

Dodging bullets as well as matrimony, Amity Sheffield knows only that she must leave home.
Blond, petite Amity Sheffield once enjoyed the life of a southern belle. But that was before the War for Separation broke out and her father left for the battlefield...before the treat of a Yankee invasion forced the Sheffield household to leave Atlanta.
When her married half-sister arranges for Amity to marry their dour cousin, Philomen, Amity is left with no choice. She might never again see Jeb Dennison, a handsome, young Rebel whose lips are mute but whose eyes speak only of love, but she is determined to be faithful to him.
As Amity disappears at dawn into the surrounding countryside with her two faithful servants, she trusts Got to protect them from enemy forces. Little did she expect that He would also lead her to the man she loved.