Coal was used to run trains and factory machines.
Answer:
The most important accomplishment of the ancient civilizations was military skill. The civilizations constantly came up with different ways to strengthen their military. The Hittites came up with the idea of using iron to make weapons instead of bronze. The Assyrians improved upon this idea to create better, lighter, and stronger weapons. This improvement helped them conquer other civilizations.
The Sumerians built chariots that helped them win wars. The Hittites and Assyrians made lighter chariots that could be driven by two horses. This improvement helped them move more quickly and easily. The need to have a stronger and better military has been the driving force across civilizations.
Explanation:
