Answer:
Tanks, Flamethrowerd, Posion gas, Tracer bullets, Inturpretter Gear, Air traffic control, Depth charges, Hydrophones, Aircraft carriers, pilotless drones. Theres a lot more but theirs a few you can use
Explanation:
The history of South America and Mexico might have been different if the Spanish had not discovered gold and silver there because they might not have had strong reasons for further exploration and colonization. Although there were also other benefits beyond gold and silver which served as reasons for colonization it was the discovery of these valuable resources that served as one of the strongest forces for further exploration and colonization.
However, following from time, Vietnamese nationalism also changed and through it, it also focused on only one goal - independence of Vietnam. After 1979 war with China, Vietnam nationalism became anti-China. The sentiment grows bigger because of South China Sea/Vietnam East Sea dispute.
I think
It is hard to tell what you need, but in order to change a law from under the Articles it took 9 out of 13 to change a law, but 13 out of 13 to Change the Articles which led to the Constitutional Convention.