Answer:
AIDS
Explanation:
Aids was first documented in 1981, and it was largely ignored. But by 1985, there were over 15,000(nearly 16,000) cases of it.
1. 1950 Korean war begins.
2.1954 First nuclear powered submarine launches: USS Nautilus
3. 1958 NASA is formed
4. 1961 JFK becomes president
<span>5. 1963 John F. Kennedy killed in Dallas
Hope this helps! :)</span>
Because they wanted to expand there territories
The builiding of the first steam locomotive train.