Answer:
Qin dynasty
Step-by-step explanation:
It was built as a military defensive line to defend from some northern nomadic nations. Criminals were sent by Shihuangdi, the emperor at the time, to build the wall, also why there are skeletons there cause the workers would die and people just build over their dead bodies though I'm not sure why that is.
Also I'm submitting my answer again as a moderator deleted it because I didn't give enough context apparently so don't mind me. If u see this then have a great day!