In what you might call a study in contrasts, last's week announcement of the upcoming addition of the Netherlands to Civilization 6, led by the Mary Poppins-esque Queen Wilhelmina, has been followed up by word today that the rapacious Mongol horde is on the way too, headed up by the mighty Genghis Khan.
Genghis Khan united the tribes of northeast Asia, ushering in an era of unified law, religious tolerance, and relative peace between the tribes. But he's better remembered for the brutality of his campaigns: Following his victory over the Tatars, who had assassinated his father some years earlier, he ordered the killing of every Tatar male over three feet tall; after defeating the Taichi'ut, he had its leaders boiled alive. His grave has never been found, according to legend because his funeral party killed everything it saw on the way to his final resting place, so nobody would know where was buried.
Harsh, but fair.
The Mongolian unique unit is the Keshig, fast-riding horse archers with the ability to make civilian and support units move at a faster-than-normal rate. Its unique improvement is the Ordu, a "palace tent," which grants a movement bonus to light and heavy cavalry, and its unique Civilization ability is the Örtoo, a sort of "combat-focused trading route" that confers bonuses to Combat Strength and Diplomatic Visibility.
Genghis Khan himself boasts the unique Mongol Horde ability, which gives a combat bonus to all Mongol cavalry-class units, as well as a chance to increase the size of his army by capturing enemy cavalry units.
The Mongolians will join Civilization 6 in the Rise and Fall expansion, scheduled to come out on February 8.