WILL GIVE BRAINLEST

What did people built in their backyards because of the threat of nuclear annihilation?

I believe the answer is bomb shelters

the mongolian invasion of china and central asia resulted in a disruption of the silk road as the chinese garrisons lost support from the chinese kingdoms which fell under the mongols. however, as the mongols established a formal dynasty in china, the successors of genghis khan restored the garrisons along the silk road allowing the safe travel caravans again.

d. she conquered the black sea coast and parts of poland.