What historical circumstances led to the building of the Great Wall of China?

Around 220 B.C., Qin Shi Huang, the first emperor of a unified China under the Qin Dynasty, ordered that earlier fortifications between states be removed and a number of existing walls along the northern border be joined into a single system that would extend for more than 10,000 li (a li is about one-third of a mile

mohenjo-daro is located west of the indus river in larkana district

women should have the same rights as men