The main grievance made by Civil Rights leaders during this time was that African Americans had just been asked to fight in a war for a country that didn't treat them fairly at home. The youth were mainly content until the 60s, when they were very outspoken against the war in Vietnam.
The Boxer Rebellion was an anti-foreign and anti-christian movement in China. This was the result of western missionaries arriving in China in the 1860's to convert the locals to christianism, in a country of a predominant taosim and confucionism population. This strong anti-foreign movement was created by a group called "The Boxers" and they seeked rebellion against western powers.
The Boxer Rebellion positively affected USA-Asian relations because of the U.S. suppression of the rebellion which resulted in the end of dynasties and the initiation of the Open Door policy in China, which stopped any country from imperializing China. This event helped to take a country that had been long resentful of foreigners and open it up, overall strengthening the relationship between them and the U.S.
Contain communism. In other words the same policy as containment.
