Great Tang: Barbarians Run Amok, and Li Er Begs Me to Come Out of Retirement

After transmigrating to the world of the Tang Dynasty, Li Er faces fierce invasions by foreign tribes and a court full of officials, civil and military alike, who are afraid to fight. So he asks me to come out of retirement. I build an invincible cavalry force and swear to protect this land's peace from the threat of the Turkic horsemen.