Journalist William Robinson recorded for us all he saw and heard of the corralling and incarceration of the Japanese-Americans in Los Angeles. He followed them to the Manzanar Relocation Camp, transcribing many of their initial reactions.
"I found myself wedged against a slender young Japanese [man] in a United States Army uniform, except for insignia. He said his name was Ijima, he had enlisted at St. Louis, Mo. in September, and been mustered out with honor in February. 'Why?' I asked. He shook his head. 'Search me,' he said. 'I guess they don't want us in the Army.'"
A similar article from the same year can be read here...
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