Construction of the Qin Great Wall

Timeline

1. -215–-214Hetao · Inner MongoliaQin Shi Huang appointed Meng Tian as general, who led forces north to drive off the Xiongnu and recover the Hetao region, creating the strategic conditions for linking the old walls and consolidating the northern frontier.
2. -214–-212Lintao to Liaodong · ChinaMeng Tian oversaw the linking and joining of the old northern frontier walls of Yan, Zhao, and Qin, and built new ramparts and passes, forming the prototype of the ten-thousand-li Great Wall from Lintao in the west to Liaodong in the east.
3. -214–-210Jiuyuan · Inner MongoliaThe Qin set up watchtowers and beacon towers along the wall, stationed garrison troops, and opened a direct road to the northern frontier, constructing a military defense and logistical supply system that sustained the northern border defense over the long term.