Let's learn about samurai flags

Thanks to the person who pointed this out:

http://en.wikipedia.org/wiki/Sashimono

Apparently samurai of all ranks could wear these back mounted flags. The symbol on them could vary, but typically was of the daimyo's crest for easy identification during battles.

An elite samurai (wow, that's an awesome term) would sometimes have a more personalized symbol on his sashimono.