The Long Ballad - Season 1

In the year 626 C.E., the Tang Dynasty faces upheaval following the successful Xuanwu Gate Incident, a coup orchestrated by a cunning prince. During the chaos, Li Chang Ge's family is slaughtered, but she manages to escape. Determined to avenge her family, she raises an army to challenge the new Emperor, Tai Zong. However, her plans take an unexpected turn when she's defeated by the Eastern Turkic Khaganate forces. General Ashile Sun, her conqueror, keeps her as his strategist, and as they form a powerful military partnership, romantic feelings begin to bloom between them.

(Source: MyDramaList)

~~ Adapted from the manhua "Chang Ge Xing" (长歌行) by Xia Da (夏达).