it would be the development of Vaccine
For example, Before vaccine was invented, many people in Europe died from small pox. Approximately, small pox alone took around 400,000 of European people each year. (to understand how bad it is, it's important to know that their total population at that time was so small compared to the current population)
The development of vaccine prevented European people during industrial revolution from infected from many type of illness that could easily harm them due to lack of knowledge to treat them.
Syngman Rhee was the leader backed by the United States during the Korean War. Cold War conflict in which UN soliders fought to defend South Korea from takeover by Communist North Korea, ending a stalemate in 1953.
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Andrew Johnson's plan for national reconstruction proved to be very lenient towards the south.
<h3>Andrew Johnson's plan for national reconstruction </h3>
- The Reconstruction plan put in place by President Andrew Johnson in 1865 gave the white South complete control over the process of regulating the end of slavery and excluded blacks from participation in Southern politics.
- In addition, if individuals agreed to remain obedient to the United States, the proposal provided for amnesty and the recovery of their property. The 13th Amendment, which outlawed slavery, would have to be upheld by the Confederate states, and they would also have to pledge allegiance to the Union and settle their war debt.
- Johnson's strategy called for the following: Those swearing a loyalty oath would be eligible for pardons. High-ranking Confederate officials and anyone with excessively valuable property would not be eligible for pardons.
To know more about Andrew Johnson refer to:
brainly.com/question/10686981
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1. California State University <em>Grants master’s and baccalaureate degrees, and focuses on liberal arts and sciences</em>
2. University of California <em>Grants doctoral, master’s, and baccalaureate degrees, and is a primary research institution</em>
3. Contra Costa College <em>Grants associate degrees and professional certificates and provides vocational training</em>