*Chinese warfare helped to expand the Han dynasty to central china, and parts of modern-day Vietnam.
* The Han dynasty was one of the first dynasty's to produce iron tools. This made them very hard to defeat in war.
* One of the very important iron weapons made to expand the Han dynasty was extra long swords. This allotted people to strike their opponents from a safer distance.
This picture here shows the Han dynasty in battle over seas. if you look closely you can see the extra long swords they made from iron.
SUMMARY: Warfare helped to expand the Han dynasty to many parts of china such as a portion of central china. Warfare would not have affected the Han dynasty if not for their skills in metalwork/iron. They were able to create extra long swords in order to fight from ships or from farther distances. These are only some of the ways that the Han dynasty expanded their empire.