Deutsches Rotes Kreuz postcard Help Please

[Rescue190]

I just picked this up and having a hard time finding a comparable item. I would think a postcard given to wounded soldiers to send to the family but I was surprised to see postage already applied to it with it being blank. It is interesting these were issued in a separate paper sleeve. Is it normal to find these with stamps already applied? These must be a common item but I did not come up with anything when searching 'DRK Postcard' Saw many other examples of postcards but no matches. All opinions and thoughts are appreciated. Thank you for taking the time to look. I am assuming the translation is good.

the front looks at us
help in German red cross

John