FWIW, both Saipan and Guam are peopled by the same Chamarro natives, but the Guamanians still view the Saipanese as collaborators who are not their equals.
“Not part of Japan, but governed by Japan as a temporary trust territory. So, yeah, the Japanese invasion was more like Hitler’s invasion of Austria.”
You are confused. Saipan became part of the US as a trust territory after WWII.
There was NO Japanese invasion of Saipan in WWII. It was the US that invaded Saipan in 1944.
Japan invaded Saipan in 1914 but at that time it was basically just a few farmers and fisherman with no means of defense.
“but the Guamanians still view the Saipanese as collaborators who are not their equals.”
Guam was not occupied by the Japanese. In 1943, Saipan had a civilian population of 29,348 Japanese settlers and 3,926 Chamorro and Caroline Islanders and by 1944 there were over 30,000 Japanese military in Saipan. Basically, they were not collaborators, they were Japanese.