... (Qin Dynasty), the wall was breached in 1215 AD . in the Song Dynasty, That's 1429 years of security from invasion. In comparison, the United ...
4 Answers · Arts & Humanities · 22/04/2009
... (Qin Dynasty), the wall was breached in 1215 AD . in the Song Dynasty, That's 1429 years of security from invasion. In comparison, the United ...
4 Answers · Arts & Humanities · 22/04/2009