Answer:
it gave exposure to african american writings art music acting and dance
With the Viet Cong winning the war in South Vietnam in 1961, president Kennedy reacted by sending American military advisors there. This was the beginning of an era that was characterized with war as american troops were sent later on.
I'm not sure 100% what exactly this question is asking, but I know World War 1 was the first war to include Gas masks and Chemical warfare, so that is more than likely the answer.