Defenses
What were the defenses of the Qin Dynasty? Basically, well structured yet simple homes, soldiers, a wall, swords, spears, and bows and arrows. Included within in their natural defenses, were your average people such as peasants, slaves, convicts, and also soldiers were used as defenses to protect the Great Wall from any harm given from the Xiongnu Mongols. The Great Wall of China, as it is called today, was a precaution taken to keep them out. The picture in the background on this site is of the modern-day Great Wall. Not only is it strong, but it is glamorous, too. The Qin Dynasty started this wall, and Qin was all about intimidation, so you can take a shot in the dark that it wasn't flimsy.
These are some of the spears that they have made and scientists have found in ancient China.