Also, if we consider the military to be an achievement, the military of Mongols and Huns should be considered the "Tour de force" of humankind.
Although the Mongols and Huns are considered by some to be barbaric without influential cultural artifacts, etc., they should be considered very influential in world history by the fact that they had a huge impact on the forming of today's great nations (such as China, Russia, and so on). Also, if we consider the military to be an achievement, the military of Mongols and Huns should be considered the "Tour de force" of humankind.