A jump into future technology. sorry i only know one.
Korea,Taiwan,Sakhalin, and Regions of Mainland China
The Bessemer process was the first inexpensive industrial process for the mass-production of steel from molten pig iron. Independently discovered in 1851 by William Kelly, the process had also been used outside of Europe for hundreds of years, but not on an industrial scale.
Answer:
I am sorry, but it seems that you are missing information for this question. What is the time period?
Explanation:
U.S. troops aided South Korea with support from the UN.