There is a World War II flashback in which we see the character Ishida (Yuki Shimoda) and his brother as young boys making their way through an American minefield after escaping from a Japanese internment camp. Wonder Woman comes to rescue them, but instead of wearing her World War II costume, she's wearing her Seventies costume. See more
There were some tragic errors after the hysteria that followed Pearl Harbor.
Well, I guess that's why pencils have erasers. Its a shame, but we learn from our mistakes.