Concept
Version 14
Created by Boundless
The Mongols in Eastern Europe
The Klis Fortress in Croatia
This type of rocky, fortified city posed a serious challenge to Mongol forces who were often mounted on horses. This particular city defeated the Mongol army in 1242.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Mongol Invasion of Europe."
https://en.wikipedia.org/wiki/Mongol_invasion_of_Europe#/media/File:Klis_0807_3.jpg
Wikipedia
CC BY-SA 3.0.