In 1946, winston churchill used the term iron curtain to refer to the

The imaginary line dividing Europe between Soviet influence and Western influence.

Explanation:

Winston churchill used the term iron curtain to refer to the the imaginary line dividing Europe between Soviet influence and Western influence.

It refers to the Political military.

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.