Some Japanese netizens discovered something odd about this old painting of a battle:

Let’s zoom in for a closer look:

That samurai’s flags have a girl’s swimsuit on them! The painting is old and the painting techniques used were nothing compared to what we have in the modern day. Here’s a netizen’s recreation of what the flag may have looked like in reality:

Don’t you love history?

[From res2ch via Kokoro Zaeega]