The Red Cross

The history of the International Red Cross:

http://www.ifrc.org/en/who-we-are/history/

The history of the American Red Cross

http://www.redcross.org/about-us/who-we-are/history

The history of the American Red Cross in World War Two

FAQWW II
history-wwii

The American Red Cross has a building in Washington that has some very nice windows by Tiffany.

http://www.redcross.org/about-us/who-we-are/history/tiffany-windows

This shows the location of the 1945 Okinawa Red Cross alongside the present location.  The right-hand image is from Google.