You Were Supposed to Deliver Supplies, So Why Did You Help the General Conquer the Realm?

Looking for Historical Fiction

I remember it was a historical novel. I can’t recall whether the female lead was reborn. When she heard that her father and brothers were going to war, she went too, escorted by the male lead, a guard. Her father and brothers were tricked by the enemy and killed in an explosion. I think the female lead’s surname was Yun.