Mankind has made incredible strides. The Inca Empire rises in the Americas. Led by Genghis Khan, the Mongols use novel military strategies to conquer vast lands. But humans are also severely tested by one of the deadliest diseases the world has known—the Plague. Mankind is ravaged by this disease in Europe and parts of Asia. In the Americas, new farming techniques and the use of maize help propel mankind forward. Amazing monuments such as Machu Picchu showcase mankind’s architectual advances.

Source: History Channel