The Korean War or conflict can be compared to the Vietnam War. The basic reason behind the United States taking a active role in these wars was to stop independent nations falling under communist control.
Answer:
Mao led the Red Army on a year-long, 6,000 mile retreat.
It would be "New Dialects" that is usually not a result of language convergence, since for language convergence to take place there needs to be a "blending" of two or more distinct languages.
Answer:
The immigration of 1924 was the Asian exclusion act which bared Asians from emigrating and set strict quotas on others.
Explanation:
(Not sure if this is what you were asking for but here we go) Wikipedia bois.
