Another interesting story is that of the US dollar bills that were overprinted with "HAWAII" during WW2. It was to protect against Japan invading and seizing c

Another interesting story is that of the US dollar bills that were overprinted with "HAWAII" during WW2. It was to protect against Japan invading and seizing currency, so it was marked for such an eventuality. https://www.futilitycloset.com/2015/08/21/hawaii-overprint-notes/ https://www.futilitycloset.com/2015/08/21/hawaii-overprint-n... https://en.wikipedia.org/wiki/Hawaii_overprint_note https://en.wikipedia.org/wiki/Hawaii_overprint_note https://gizmodo.com/the-us-issued-special-banknotes-in-case-japan-invaded-h-1736274265 https://gizmodo.com/the-us-issued-special-banknotes-in-case-...