Turkey's Defense Ministry said five soldiers have been killed by methane gas in northern Iraq. They were searching a cave Sunday for the remains of a fellow soldier killed by ...

Who Built the Great Wall of China? Qin Dynasty (221-206 BCE): The first emperor, Qin Shi Huang, started connecting older, separate walls to create a single, unified barrier.

The Great Wall built in the Qin Dynasty (221 BC-207 BC) in Guyang County is well preserved due to its rock structure and the protection efforts made by local authorities.