The Iron Kingdoms - Witchfire
Information for World History pages was quoted from here.
The Orgoth explorers were representatives of a tightly disciplined military society hailing from somewhere across the Gulf of Cygnar. They were a nation of humans, but they were savage, callous folk with many dark and unsavory customs. Seeing an opportunity for conquest, they immediately launched an invasion and a war of domination. The citizens of the Thousand Cities were taken by surprise, but they fought valiantly – and to no avail. The land eventually fell under Orgoth control, though there were two centuries of scattered bloody resistance before the Thousand Cities were totally subdued.