MY GUY THE CRECENT IS A PROTECTED SYMBOL
Just like the red cross wearing the crecent means you may no be fired upon and you are not allowed to shoot back either. The armband translated to "Im out of the fight to help the wounded and is protected under the Geneva convenetion"
They are however not allowed to wear them when either conducting or supporting a military operations
Military IFAKs are marked with a black cross to not cause confusion as the red cross is also protected under the Geneava convention