The Crimson General's Love Strategy.

In her previous life, the heroine joined the army in her brother's place, fighting for her country for five years. Upon her return, she was forced to marry a fifth-rank official with no future. As a military commander, and because their relationship was arranged, she and her husband had been at odds from the very beginning. At the end, the marriage failed, and her family betrayed her, not seeing any further use in her. Her husband was eventually framed, and she was hunted to death by her own father and stepmother. However, her husband, in his final moments, protected her with his own body, leaving her feeling deeply guilty. But the heroine gets another chance when she reborns, and from then on, she does everything to change the course of events.