Answer:
iron weapons
Explanation:
<u>During the Qin dynasty, the iron weapon became widespread in their military and this had an impact on their military strength. </u>
The iron industry was in high use during this dynasty, and many metal products were generally used (tools, weapons, dishes, etc.)
<u>Archeologists found various iron weapons from this time, such as swords, spears, saggers, machete, as well as various shooting weapons.</u>