Hello.
It was the staging area for the invasion of Japan.This larger-scale invasion never occurred, as Truman elected to end the war by dropping two atomic bombs on Japan.The Americans planned to use Okinawa as a launching base for air attacks and eventually an invasion into the larger islands of Japan.
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I think this is A yep A is your answer
Immigrants from southern and eastern Europe were thought to be mostly anarchists. The immigrants would work for lower pay and that also impacted the 1919 Red Scare. The Sacco and Vanzetti trial typified the Red Scare era of 1919.
Germany, Austria-Hungary, Russia i remember this from last years history :D