In a dynasty that is not recorded in history.
When the princess was a child, she met a future female general. In their golden years, the two became friends. When she was in her late teens, she was arranged to go to an enemy country to get married, with the female general protecting her. Within half a year, the war between the two countries started again, and the female general took advantage of the chaos and took her back to the country.
When she became a candidate for empress, the general had other ideas.
Intention: Time can dilute everything, don't let the past's unhappiness weigh you down and be unable to lift your head.