Who is this?

[AussieMick]

Thanks, Steve. I got my initial guidance from "The Spanish Civil War - A Very Short Introduction" by Helen Graham. She writes ' Oliver Law, the black commander of the American Abraham Lincoln Brigade, was killed at the battle of Brunete in July 1937. He was the first military commander in US history to lead a unit of troops that was not segregated along racial lines.'

I can see I should have used those exact words. I see in the article you posted it states Charles Young was 'Assigned to the predominantly black 9th U.S. Cavalry'. So, I assume, the white man that complained to his senator was presumably one of the few whites under Young's command.

Another reference for Laurie's warehouse from that book about the Spanish Civil War.....

Salaria Kea was the only African American nurse working in the Abraham Lincoln Battalion
https://en.wikipedia.org/wiki/Salaria_Kea

(She was born in Milledgeville Georgia where author Flannery O'Connor lived ... I only mention that because I think O'Connor is the greatest short story writer ever ...

"After her arrival in Spain, Kea helped establish a field hospital at Villa Paz near the Spanish capital Madrid. She was captured by the Spanish Nationalist Army but managed to escape with the help of International Brigade soldiers after being held for six weeks. In Villa Paz, Kea met an injured Irish soldier, John Patrick O’Reilly, whom she later married. In early 1938, Kea was transferred to different units in Aragon, Lerida and Barcelona and was herself injured in a Nationalist bombing raid. Her wounds were so severe that she was sent back to the United States in May 1938. "

Kea ... another person that they could make a real tear-jerker film about?