China had invaded Vietnam
Discrimination against african americans and segregation
Communism, socialism, democracy?? Hope this helped. Let me know if you were looking for a different type of answer
Answer:
B. to keep invaders out
Explanation:
The wall was built to help keep out northern invaders like the Mongols. Smaller walls had been built over the years, but the first Emperor of China, Qin Shi Huang, decided that he wanted a single giant wall to protect his northern borders.
