What china invention was used in the military?

Answer;The Chinese first used gunpowder to make explosives used by the military in the Five Dynasties and Ten Kingdoms period (五代十國, Wǔdài Shíguó). The Chinese invented cannons made of cast iron, cast iron landmines, and rockets, and gunpowder was used to make bamboo fireworks in the Song Dynasty .

Explanation:

"a shortage of traditional labor created new opportunities in the workplace. a major cause of the internment of japanese americans during world war ii was. racial prejudice. in the early 1940's, the "destroyers-for-military-bases deal" with great britain and the lend-lease act were evidence that the united states."