Zhenguan's Iron Cavalry Tang Dao

In the tenth year of Zhenguan of the Tang Dynasty, Goryeo raised an army of 250,000 troops to seize Pingzhou, a city on the northeastern border of the Tang Dynasty. Xue Yantuo's army of 60,000 troops raided Youzhou. The grassland tribes also formed a grassland coalition to take advantage of the situation. For a time, the borders of the Tang Dynasty were at war. At this time, Pingzhou only had 20,000 infantry and 3,000 cavalry, a huge disparity in strength. Because his nine-year-old son was missing, swordsman Tuoba Han followed the traces of the kidnapper all the way to Pingzhou and swore: No one who kidnapped my son would have a good life. Tuoba Han's good brothers Zhang Zhongjian and Xu Qinglin also came to Pingzhou after hearing the news. The three gradually found out the truth about the kidnapping. At this time, the enemy had already arrived at the city...