Great Tang: The Invincible Crown Prince

I transmigrated to the Tang Dynasty.

My name is Li Chengqian.

My father is Li Shimin, and my mother is Zhangsun Wugou.

I originally just wanted to live a happy life, but when foreign enemies invaded, I decided to fulfill the great ambition I had in my previous life: to truly unite all under Heaven!

Any vassal, at home or abroad, who dares to raise arms will be put to death.

Wait, that’s not right! I’ve united the realm, so what vassals are left?