Inventions, Wealth, and Problems
After the fall of the Han dynasty, several other dynasties rose to power through a time called the Three Kingdoms Period, although several kingdoms were at war. However, there is noticeable overlap between these dynasties as they came to power. Due to their cultural similarities they are often grouped together.
By 1211, invaders from the north known as Mongols began to invade and conquer Chinese cities. In 1279, they had seized nearly all of China and started the Yuan dynasty.