Historical Historians in Imperium Romanorum Posted July 27 · Edited Sunday at 06:08 AM by dnewhous · Report reply It looks like Genghis Khan moved into the Forbidden City and took his title in Chinese. He was the start of the Yuan dynasty. I remember something else about history. If you examine Greek and Egyptian history closely, 1174 BC is the year that everything changed. Not exactly 1177 BC. There are now more eras than ever in Egyptian history. And I think that is the best year for making a division between the copper and the bronze age. What would be the iron age? I don't know. This is known as the Late Bronze Age Collapse. I do remember the iron age was 4th century BC in Ohio. That was a very advanced gifted program in elementary school. I don't remember what the event trigger was. I'm fairly certain it was in Athens, Greece.