Answer:
The Europeans brought with them diseases such as measles and smallpox against which the American tribes had no natural immunity. They spread like wildfire, killing rulers of both the Aztecs and Incas, along with millions of other people.
very well the war end and the armor in china use in war to keep then safe to not get hurt.
Cotton gin- Eli Whitney
iron plow- Jethro Wood
steel plow- Oliver
reaping machine- Cyrus McCormick
clothing factory- Francis Lowell
sewing machine- Elias Howe
Hope that helped :)
