The significant contribution made by the hittites, assyrians, and the babylonians after each group conquest in the middle east are the following:
• Hittites learned how to extract iron from ore and they developed advanced weapons and chariot.
• Assyrians founded the first library, encouraged well organized society and first to come up with laws governing royal family.
• Babylonians establish a new empire, rebuilt the cities surrounded babylon with a moat and built the hanging gardens.