The African-American unit you are describing are known as the Tuskegee Airmen .
This group of African-American pilots were critical in the success of the United States during World War II. Over the course of the war, these men completed thousands of missions. These men were extremely successful, as they performed 200 escort missions and never lost a bomber in the process.
They found artifacts and writings
I would have to say railroad I think
<span>Otto von Bismarck
He was called the Iron Chancellor
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