I just learned that for ten years before their invasion, Japan mapped and spied on the Philippines through an influx of Japanese soldiers disguised as immigrants. Filipino president Manuel Quezon eventually learned that his gardener was a major in the Japanese Army, his masseur a colonel.
Reference: KILLING THE RISING SUN by Bill O’Reilly and Martin Dugard (suggested by Rooster).
Retrospective: How might we have done things differently, to protect the rights of Japanese-American citizens, and still ensure we did not repeat what the Philippines went through?
The photo is from Manzanar, as documented by courageous social photographers such as Dorothea Lange and Ansel Adams. I have visited Manzanar, 1998, and even now the sensation of intense tragedy/sorrow is palpable.