They and their armies raided and destroyed European cities.
Explanation:
When we imagine the Mongols, we will most likely create in our heads an image of the terrible steppe warriors who invaded a vast area covering almost all of Eurasia - the Mongol Empire lasted from 1206 to 1369, covering an area of approximately 33 million square kilometers.
During their conquest, the Mongols devastated entire states and completely destroyed some of the largest medieval cities.
Although the Mongols were indeed among the most successful warriors of their time, compared to whose plunder march and the Vikings could be ashamed, the fact is that they have developed a rather sophisticated and cultural civilization.
The United States was willing to pay more per mile for the Gadsden Purchase than for the Mexican Cession because the Gadsden Purchase gave money to the United States to build a railroad.
