Chronicles of Great Yan: Season One

Zhang Bai, the second legitimate son of the founding emperor of Great Yan, was enfeoffed as Prince Gan and stationed in the northwest. When the Crown Prince died, he was the most likely candidate for heir, but instead, the emperor's grandson was appointed, leaving his fervor to turn cold. The late emperor suddenly passed away, treacherous ministers held power, and an edict to reduce fiefs led to the deaths of five princes in one month. Next was Zhang Bai. Retreat meant death; rebellion meant winning the realm! He led his iron cavalry north to strike the northern desert, slew the Northern Desert King in battle, and formed a blood alliance with the Northern Desert Empress. He then marched south to purge the court, executed the treacherous minister, deposed the tyrant emperor, and ascended the throne! With powerful aristocratic families within and strong neighbors breaking alliances without, this realm was won by his life; from now on, this world would be his to command. — Description from novelcodex.org