Did the Great Wall pose any sort of challenge to Genghis Khan's invasion force? : AskHistorians

Reflections on Donald Trump's proposal for the Great Wall of the USA: At the time of Genghis's Mongol invasion around 1211, the Great Wall was still mainly earthen ramparts which posed some issues to his cavalry mounted force. However, Genghis and his generals exploited the Juyongguan Pass which was a mountain pass that was not heavily defended. Though these forces posed a risk, they were overcome easily by Genghis horde who then flooded into southern China. Edit: The battle is known as the Battle of the Badger Mouth and is considered one of the bloodiest battles every fought click here Do more research to see how this pre-medevial clown "thinks."