Great Tang: Marrying Princess Changle by Force from the Start

A young man from modern times transmigrates to the Tang Dynasty, only to become the Duke of Zhenguo's only son! And his father-in-law is none other than Li Shimin? After awakening the War God System, he learns that the Princess Changle, just seven years old, is to be married off to the Turkic khagan! The princess's husband takes up a military order and leads 300,000 troops to intercept the wedding procession and rescue her! A dark-gold cloud-patterned spear stands atop the city wall, and the enemy army retreats a hundred li in an instant! Li Shimin: “My worthy son-in-law, I am ashamed by comparison. You should inherit the throne instead!” The Turkic barbarians: “As long as the military sage of the Tang Dynasty still lives, we will submit unconditionally!”