Börte was Genghis Khan's betroved wife at a yough age and was kidnapped by a rival tribe. This moved him towards the path of conqueror.
Genghis Khan practised meritocracy and encouraged religious tolerance in the mongol empire. This unified the mongol empire under his rule.
The mongols first attacked china and made their own dynasty.
The mongols expanded there empire all the way to the middle east only being stopped in Eygpt.
The mongol empire was extreamly safe. It made trade a safe job again and reduced crime to almost 0.
The mongols fell from being to big for their time so even thogh there information sytem was top of the line it was still too slow to respond to attacks from nomads and the chinese that wanted their home back.