The Mongol Empire
The Mongol Empire from 1206 to 1405 was the largest contiguous empire in history. Started by Genghis Khan, their army was a well-organized killing machine and used brutal war tactics to subdue largely populated cities. If the city complied with their wishes, they’d be spared and allowed to live, but if they didn’t, their city was destroyed and everyone inside was killed. It’s estimated 30 million people were killed during their reign.
I'm not sure where or how, izismile gets his facts... well, not facts really, leftist propaganda more like it. As in, Confederates raping "millions" of African-American women and, too, the items you mention as well as many others. Columbus a 'conquistador'... seriously.
Post entertainment, entertaining pictures, etc., not skewed takes on history in support of a Howard Zinn view of the world.