Derek Moran
Red Cross, Red Crescent and the white flag
Modern laws of war, such as the 1949 Geneva Conventions, also include prohibitions on attacking doctors, ambulances or hospital ships displaying a Red Cross, a Red Crescent, the Red Crystal, or other emblem related to the International Red Cross and Red Crescent Movement. It is also prohibited to fire at a person or vehicle bearing a white flag, since that indicates an intent to surrender or a desire to communicate.[citation needed]
In either case, persons protected by the Red Cross/Crescent or white flag are expected to maintain neutrality, and may not engage in warlike acts. In fact, engaging in war activities under a protected symbol is itself a violation of the laws of war known as perfidy. Failure to follow these requirements can result in the loss of protected status and make the individual violating the requirements a lawful military target.[citation needed]
https://en.wikipedia.org/wiki/Laws_of_war#Red_Cross.2C_Red_Crescent_and_the_white_flag