Answer:
WWI:
The sinking of the Lusitania by a German U-boat in 1915 and the Zimmerman Telegram that attempted to incite a Mexican invasion of the USA. These two things convinced the American public of the need to enter the war and allowed president W.Wilson to do it.
WWII:
The USA remained neutral for two years, but the surprise Japanese attack on Pearl Harbor of December 7, 1941, outraged the public. Congress authorized president FDR to declare war on Japan.
Korea:
It was already the Cold War. Washington thought that the invasion of South Korea by North Korea in 1950 was an elaborated plan to expand communist and it reacted to oppose and impede it. It was the rationale of containment.
Vietnam:
Same reason as in Korea: to stop communist aggression and expansion in Asia, following the containment doctrine.
Explanation:
The lesson is that not to take punishment to an extreme,or that harsh punishment is not the ideal way to solve a conflict,as it might backfire.
After WWI,Germany was punished harshly for starting the war by supporting Austria-Hungary. The punishment involved was to pay a great war dept of 33 billions, disarming(no air craft allowed,reduced army to 100000 men etc.) . It has caused much problem to the nation such as hyperinflation, unemployment etc.
This finally led to the up-rise of totalitarianism, in which the nation become aggressive in order to get national glory, and many jews were killed in blame of hindering Germany's development the or even leading to her defeat. It finally post a world threat and caused the outburst of WWII. If the punishment was not as harsh, totalitarianism could be avoided as well as WWII. Thus the lesson is that not to push the matter too hard and be more lenient
The best and most correct answer among the choices provided by the first question is the fourth choice or letter D "Meiji"
On the other hand, the best and most correct answer among the choices provided by the second question is the third choice or letter C "Nationalism"
Lastly, the best and most correct answer among the choices provided by the third question is the second choice or letter B "<span>larger populations ofJews in eastern Europe."</span>
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