Show and Tell

Back in 1942, U.S. military strategists worried that Japan might capture the Hawaiian islands. If they did, Japan would capture millions of U.S. dollars in currency. So they had the mint print a bunch of bills marked "Hawaii" and the government replaced the currency in the Islands with the specially marked bills.

Judy found this one in some stuff her grandmother gave her years ago.

The plan was to declare these bills valueless if Japan took the Hawaiian islands. That didn't happen, and, according to Wikipedia, the U.S. government collected and incinerated the Hawaii bills in 1944 after the Japs were retreating, island by island, back toward their homeland. 

There are a billion stories about WWII, and I am fascinated by all of them.