The correct answer is the Influenza Pandemic.
This Influenza (flu) Pandemic killed between 20 and 100 million people (estimates differ) - more than the war itself!
The source of the Pandemic is still not known, and people suggest such places as the US, China and France.
Answer: Poverty among Mexican Americans who had lost their land
Explanation: One long-term effect of American actions in the lands the country claimed after the Mexican American War is that there is "Poverty among Mexican Americans who had lost their land"
Following the end of the Mexican-American war in early 1848. Mexican Americans with land ownership lost their land to the federal government of the United States.
Therefore, they were left with no land as a means of generating income particularly for farming to make money.
Hence, the majority of these people plunged into hardship and eventually poverty.
Isaac Newton discovered the universal law of gravitation
