How do imperialism and militarism work together to promote war?

Militarism gives a nation the means to carry out its imperialistic aims of taking over other nations. Having the means to wage war might make nations more aggressive and eager to attack.

the answer should be arrogance & pride.

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.