A militia is
a
an army unit housed within the presidio
b
a Mexican fort
c
a group of civilians who act as soldiers
d
professional armed service personnel
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.