During the Qin dynasty foot soldiers were invented and cavalry became more popular. Foot soldiers were usually equipped with a bronze sword and sometimes a spear. Most soldiers wore light armor to increase speed. These new inventions led to a lot of successes in wars and an increase in power, wealth and land. Swords with a longer blade were also invented to be able to stab more easily.
During the Qin dynasty crossbows were put into use. They had more power and aim than a regular longbow but were heavy and hard to reload. Crossbows were used in almost every war and up to 10,000 people would use them at a battle. They made a crossbow with a very complicated plan and only the most skilled mechanics could make them. They used the complex design so the enemy wouldn't be able to create them for themselves. They also reinforced that tactic by making special crossbow bolts. Furthermore, new improvements were also added to the crossbow such as a scope. New crossbows were made that could shoot multiple arrows at once.
The dagger axe was also a common weapon for soldiers. Although they were made earlier than the Qin dynasty (The Warring States period) they were used the most during the Qin dynasty. Dagger axes acted like halberds- they could stab and swing. Dagger axes were normally made from bronze and had two heads. One would be a sharp blade and the other would be a spearhead or a curved blade. The attacker would use the straight blade and stab at the opponent and then pull it backwards with the curved blade slicing the person's neck. Jade dagger axes were used as well to act as a source of power and spirit.