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This is probably only a partial answer, but when the Hyksos invaded Egypt and established the 15th dynasty they didn't have iron weapons, relying instead on the chariot and composite bow.
In ancient Mesopotamia there are other examples of empires that didn't use iron weapons, such as the Akkadian Empire that started in the 24th century BCE. Another one is the Old Assyrian Empire (2025-1750 BCE), in which, as the Wikipedia article informs, iron was known but was so rare that it was more valuable than gold. A third one in Mesopotamia is the Babylonian Empire (Hammurabi's reign seems to have gone from 1792 to 1750 BCE, although these dates are disputed by some sources).
I have used some Wikipedia articles for this answer, and a lot of information about these peoples can be found in Mario Liverani's The Ancient Near East.
Upvote:1
The Empire of Sargon. - the first one.
What is funny, some sources consider bronze as the main target of the existence of that empire. The mechanism was as such:
The Empire needed bronze. Bronze=tin+copper. There were no problems with copper. But tin was expensive. So, the empire wanted to get cheap tin.
The problem was, that every time it wanted the lands of some neighbor that had cheaper tin and got them, the tin price in these lands immediately rose (because in the whole Near East, there are no tin mines, they were all merely tin traders). And the situation repeated again and again. The farthest limits where Sargon and his son got, remain unknown. But they never reached the tin mines. So, the empire fell apart being senseless.
Guys didn't know the economy laws or logic. And that remains to be the custom of dictators :-)